Just started a DraftKings league recently. There will mainly be contests for NFL but also NBA, NHL, MLB and other sports as well. Basically whatever people decide to make a contest for. Anyone is able to create a contest. You do note have to enter each and every contest that is put up. Buy in amounts will mostly be lowish ($1-$5) but there are no rules on the buy in amounts.
If you’d like to join please comment with your DraftKings username!