Advice for Marketing Techniques for Instagram Bot

My advice? Don't do bots. Someday and somehow, Instagram may develop such things that will detect those kind of features and activity. You could hire someone on this on a cheap price. Plus, it will be a fair trade to everyone and you can engage to your prospective client more efficiently

How are you posting images when their API doesn't allow for it?

is that ok with the instagram's use policies ? are you a merketing/advertising partner with instagram/Facebook to have access to their (more privileged) APIs ?

you should post about it on hacker news

I don't understand you, I'm currently put it on HackerNews