If you check the RLB dashboard, 24 hours RLB burnt is around $250k
24 hours total volume is around $13M so thats pretty much around 2% of the total volume which is nothing at all. Rollbit cant create artificial price pump by using the buy and burn feature. There are alot more hype and if you actually check twitter, there are alot of tweet about RLB which means its one of the hot stuff people are looking at right now
Buy and burn program can help to reduce total supply of RLB token and if the team can maintain the program, it will help the token to gain more value. It's more helpful for the token organic growth than playing pump and dump games. Rollbit team are solid and they will not do it to harm their casino reputation.
The token value is from many other components, not only from the Buy back and Burn program. This article from Rollbit blog has information about components that make up value of the token.
RLB Utility Guide: Everything you need to know