The fact that you have so many followers in so little time shows that you hit on a great idea and a solution to a problem that people would like solved. Personally, I'm new to Steemit and I'm sick of the "pay to play" bots. You're doing it the right way, from what I can tell. Your bot gives small rewards for participating, but the real goodies go to content that another PERSON actually likes. Your system has some weak points, but it's brand new and with the feedback you're getting, it's only going to get better.
Bescouted is also doing good work to improve photo quality on this platform, but they are way too heavily leaned towards portraits of "pretty girls looking pretty" as I like to call those pictures. I appreciate your variety.