However, on the withdrawal limit, I disagree.
The reason I think they took it is because they have a faucet. They want to chase people away who are there for the faucets. 3 times a *2 win and leave is not a way for a company to make good betting money. They are not there for the too small fishes.
However, if you insert just 1 dollar and bet wisely, it's not too hard to make some serious profit quickly. And that's when the withdrawal limit is quite fine.
The withdrawal limit used to be 50,000 BTC for a very long time. It was only until quite recently that it was changed to 100,000 BTC. Other than discouraging faucet abuse, my guess is that this has to do with the lower BTC price as well. 50,000 BTC was worth about $0.25 during most of 2014. Today, 100,000 BTC is worth about $0.25 so the end result is pretty much the same.
Huh? Stunna ended the signature campaign months ago. It will probably be returning in some other form soon and Stunna seems to have confirmed this but just like the case with PD3, it seems to be taking a while.