I re-posted this from Hifsa's world, who re-posted it from Aryia; the creator of this challenge. So this is what it says:
Hey everybody! I've seen some posts about how "active" theOtaku is and people worrying/not worrying about it. I say that theOtaku IS active. It's great here and I always have people to talk to. BUT I do think that all the submission could use an extra comment boost! Thus I created this challenge and to simply have fun :D
The Rules:
1. Comment at least 3 times on submissions (Wallpapers/fanart/e-cards/Fan Comics/Quizes). World posts comments do not count!
2. Each comment you must point out TWO things you like.
3. Total of 30 days!
Prizes
1. Every participant will receive a portfolio icon gift!
2. If there are 15 participants, then I'll pick a random participant and make a colored drawing for him/her.
If there are 20 participants I'll also randomly choose somebody and make a wallpaper for him/her.
Furthermore:
Challenge starts next monday: 14th of October.
At Day 0 I will note down the number of comments you have and every 3 days I will update the amount of comments participants have made since day 0.
I can't check every single day to see if everyone has commented, so i'm counting on your honesty!
Just click here to ask in the comments of that original post if you want to join!
~Ri-chan