I am hosting a constrained writing contest, where each week writers are presented with a constraint to limit their writing.
It's different from other writing contest because it doesn't give you a writing prompt, so you are free to write about any idea you have.
The reward is the post's payout in full, both SBD and STEEM, from which I take a 5 % fee.

Hope it counts ^^
And thanks for the list, will participate in some contests myself! :D (Actually just did in @raised2b's ^^)