Strategies are made so that the person playing the gambling should win. They are not made to make the gambling houses in. For this reason it is very much clear that a gambling houses will not develop strategies which will give them losses.
No, I have seen gambling houses also promoting innovating strategies so that they can keep their gamblers hopeful to hit and recover their money. Yes, there would not be any negative things even the gambling houses support the revolution of strategies as they are known for paralleling updating their algorithms to save their bankroll. They may lose something against any new strategy but definitely not in long run. For sure they will bring up such strategies which will eventually fail and they (gambling casino) will win.
That is true. They need gamblers to be sticking around them hence they may do such things and those perks are even looking like in support of gamblers, in real time they are not actually in the end 
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