I would say one of the worst moments is when Fortune Jack increased their minimum withdrawal limit to 0.1 BTC without any prior notification i would consider that the worst moment if you are rolling who uses a low bank roll because the site does not have a deposit limit but still want to control it with the withdrawals. 
There's an announcement for that. They are not going to just change something on their website without announcing it first. Some people will surely be affected with every update so they announce it before they patch it so people can do what they have to do first. Anyway, let's say that you weren't able to get your money since the withdrawal minimum was increased, you can just deposit your money into your fortunejack account to have a balance of more than 0.1BTC. It's not that hard to deal with if you have the money to do so.
Was the announcement made on the forum or by email? Not everyone is on this forum...
It's important to check on announcements every day because you might be missing something important. There's an announcement here, I'll quote it down below. I'm pretty sure that they put this announcement in their website as well since not everyone's here and not everyone's checking their email everyday. Only common place for all the gamblers is the gambling site alone.
Check out number 2 for the detailed announcement but here's the whole post:
Dear gaming community,
We would like to thank for your feedback and added interest in our casino, your thoughts and suggestions are always respected and considered at fortunejack.com. We can understand how this must be frustrating seeing increased minimal withdraw amount, however we would like to assure you that our intention is to promote gameplay for all types of players, regardless of their bet value. In fact, we have always served lowest bets in the industry starting from 0.00000001 XDG bets on Dice and 0.00005 BTC on Slot games.
Minimal withdraw was temporarily increased due to two reasons:
1) Probably you are familiar with the fact that fortunejack.com takes initiative to cover expenses of every outgoing transaction for our players' best comfort. Recent increase of transactions on Blockchain caused withdraw delays and we had to increase transaction fee multiple times to create instant transaction processing infrastructure for our player's satisfaction.
2) We experienced enormous number of fraud abuse cases on low outward transactions recently and limit increase served as a temporary measure to analyse and prevent the happening. Withdraw limit will be updated on Monday at 9:00am server time and fixed on 0.01BTC
We are glad you like our game selection, we are always on the look out to expand our already expanse and varied selections of great games available! Fortunejack is getting ready for major update which will be conducted in the upcoming weeks, update includes new user interface & design, promotions of all kind, INSTANT deposit processing, new portfolio of games including Poker, Betting and Lottery brands!
A circulating story that limit increase may be associated with some kind of 'exit plan' is not based on any true story and you can rest assured fortunejack.com will remain as your favourite, unbeatable gaming brand for the unlimited period of time!
We would like to thank you for your feedback once again and accept apologies for inconvenience caused due to temporary withdraw limit update, we can assure you this is not our intention and feedback and training will be provided to prevent our players feeling this way.
We also offer a 24 hour live chat service to all our players, please feel free to request a chat with our friendly agents and they will update you on any issues that concern you.
Best of luck,
fortunejack.com
We would like to thank for your feedback and added interest in our casino, your thoughts and suggestions are always respected and considered at fortunejack.com. We can understand how this must be frustrating seeing increased minimal withdraw amount, however we would like to assure you that our intention is to promote gameplay for all types of players, regardless of their bet value. In fact, we have always served lowest bets in the industry starting from 0.00000001 XDG bets on Dice and 0.00005 BTC on Slot games.
Minimal withdraw was temporarily increased due to two reasons:
1) Probably you are familiar with the fact that fortunejack.com takes initiative to cover expenses of every outgoing transaction for our players' best comfort. Recent increase of transactions on Blockchain caused withdraw delays and we had to increase transaction fee multiple times to create instant transaction processing infrastructure for our player's satisfaction.
2) We experienced enormous number of fraud abuse cases on low outward transactions recently and limit increase served as a temporary measure to analyse and prevent the happening. Withdraw limit will be updated on Monday at 9:00am server time and fixed on 0.01BTC
We are glad you like our game selection, we are always on the look out to expand our already expanse and varied selections of great games available! Fortunejack is getting ready for major update which will be conducted in the upcoming weeks, update includes new user interface & design, promotions of all kind, INSTANT deposit processing, new portfolio of games including Poker, Betting and Lottery brands!
A circulating story that limit increase may be associated with some kind of 'exit plan' is not based on any true story and you can rest assured fortunejack.com will remain as your favourite, unbeatable gaming brand for the unlimited period of time!
We would like to thank you for your feedback once again and accept apologies for inconvenience caused due to temporary withdraw limit update, we can assure you this is not our intention and feedback and training will be provided to prevent our players feeling this way.
We also offer a 24 hour live chat service to all our players, please feel free to request a chat with our friendly agents and they will update you on any issues that concern you.
Best of luck,
fortunejack.com