Currently 429 users already retweet the post, so the winning chance is only 0.0023%
There have been 481 retweets and 1520 likes as of my writing this post which makes it more difficult to win but you are not losing anything with this giveaway so leave it on your luck.Anyone from the list could be randomly picked up to have chance of winning $100.There are many opportunities if you are active on twitter from Rollbit side with amount like $100 which is good sign from them.
Even though the chance is low to get the prize, I always try to be there because everything still depends on luck.
Sometimes people think that coming first at events like those shared by Rollbit has a greater chance but in reality all of them are randomly chosen by the Rollbit team.
So it doesn't hurt for me to always follow the events that are shared by Rollbit on Twitter.