I got this interesting response...
Fees are actually not able to be predicted accurately. You can look at data from the past and make a guess, but you have no way to know what the supply/demand of block space will be after you've broadcast your transaction. There is no actual mechanism within Bitcoin to ascertain what the fee guaranteed to be mined will be. We can use data such as provided in that link to dynamically set fees - but we will always come up short because as demand changes the fee will never be perfect, and we will receive complaints (as we did in the past before changing the fee level) that our fee was too low. We can't win with this because Bitcoin was not designed to accommodate variable fees.
Bitcoin was not designed to have fees escalate, because it was not designed with a blocksize limit. Unfortunately, the project was hijacked by people who do not want on-chain Bitcoin transactions to be the future of peer to peer money. Using censorship and propaganda, they have succeeded in promoting the idea that Bitcoin is not Peer-to-Peer Electronic Cash, but rather "Digital Gold". As such, fees escalated and while I resisted raising them on our Bitcoin transactions, ultimately we had no choice but to raise fees. Fees continued to escalate until it was no longer possible to accept on-chain bets using our original system, and eventually became totally unworkable. We had to retire the Bitcoin on-chain game, which is now only playable with BCH, LTC, and DOGE.
Since then, Bitcoin Cash has arisen as the standard bearer for the Bitcoin designed by Satoshi and described as a cash system in the original whitepaper.
Those who are loyal to the regime which has cooped and changed the Bitcoin system to be a settlement layer insist that high fees are a healthy state, and that BTC is digital gold. So, for our off-chain game, for now we are leaving BTC in place as a deposit method, however we will now treat this as digital gold as well. Rather than chase the fees around, we will leave them at the current level. As argued by the regime controlling BTC, Bitcoin is not for small amounts of money to be transaction.
So, again if you would like to play with a low-fee network that is reliable, I recommend Bitcoin Cash. LTC and DOGE also have low fees, though DOGE is not actively developed, and LTC has aligned itself politically with the core regime and could ultimately suffer the same fate in terms of fee level should it not choose to evolve.
We will likely add some other coins in the near-ish future, likely XMR and ZEC at first.
I'm sorry our fee level didn't meet your expectations, but this is a fundamental problem with BTC as a settlement layer, and our site's handling of it can never make everyone happy because it is a broken system.
Best regards,
Bitzillions Team