Ripple has been sucking KYC information for the US government and for Banks since it's release and any true Crypto currency enthusiast will tell you that it is a bad idea to gamble with coins that are 100% traceable.
They did a poll.
They didn't hand pick Ripple. People wanted it, Stake.com delivered. However, I am not sure if these polls were completely honest. People can create multiple accounts to vote and Ripple bois are famous for the massive amounts of bot-like shilling on twitter and reddit, so...
I believe CMC has the biggest role in this bullshit. Whatever credibility/fame Ripple has now they owe it to CMC. If these noobs didn't list that PoS in the first place Ripple wouldn't even exist now.
I do not understand what is wrong is stake.com offered Ripple as a depoist method. If you do not like ripple, you still have other deposit option like btc ,doge etc.
Those who are playing gambling least bother about the Xrp being centralized or bank coin. Their main focus is on the gambling and how to increase their bank roll.