So, not really sure how 'in control' this will stay, but yeah. Basically, you have to post what the user above you says you post. Like I'll say, 'Post the 10th photo that you have in your camera roll' and it can be on any device. If you don't have, like, the 200th photo or something on that device, than say you don't have any 200th photo if you have only, like, 12 or something.
Idk, it's just something I came up with 'cuz I was bored.
So, Post the 50th photo you have on your camera roll!