When you block more than 499 people, some of them get unblocked?

haha! :)

I guess his friend-enemy ratio is still much lower :-)

I don't want to have enemies. I wish everybody would give rematches. Unfortunately, some people don't. It's their right, but I don't like to feel defeated with no chance to recoup. If there would be an option to create "several rounds challenges", that would solve the problem.

Yes, a 'two game' challenge would be a nice thing to have. More rounds is problematic when people run after first game (too many points as reward, some form of cheating).

Yes, something like even challenges. You have to play 2 games if you joined, and if you accepted the third game, you have to play the fourth too, and so forth.

Blocks 499 people? Who are you :p