It is good idea for Poorbot to try and find good replacement for Stake, and I think Roobet has very nice reputation in bitcointalk forum, they could be the best candidate.
Though, if this ceasing of operations by poorbot on Stake is due to regulatory reasons, then unfortunately it could be matter of time before other big and reoutable casinos with a high volume of gamblers could be forced to give up on their tilling feature as well. This case with stske does not do anything but create a precedent for the future to come to big casinos which use Bitcoin or other cryptocurrencies.
To me It does not make sense why the administrator of a casino on the internet would suppress a function which is very popular and taken from granted, unless there is pressure from external actors to do so.
I hope Stake will re-imolement the tipping feature in the future, instead this leading to the disappareance of the feature on the gambling ecosystem