Actually BTG is the first provider who implemented the buy feature feature, the rest follow. By the way, Dead or Alive II is coming soon, I wonder what's that all about.
I like Amatic's Dragon's Gift very much, that game gave me a whopping 750x bet a few weeks ago. Free spins bonus is not easy to win but I also won a 5 scatters win from that game but with a disappointing prize money of 50x bet.
I think Yggdrasil has great games, of course there are some bad ones but all providers have them. We all have different tastes, my favorite provider is Amatic, their games look old but they pay well.
I think self exclusion does not work if you're not willing to stop completely. Online gambling is a large industry, you can stop playing at one casino but the doors of hundreds others are wide open. If you want to stop, you need to stop completely otherwise self exclusion is worthless.