Hi Christian -
textbooksplease looks great. nice job!
I was wondering:
1 - how do you monetize?
2 - how does the post-stickers-get-tshirt marketing channel perform (and how do you know, as it's hard to track..)
1. Affiliate links. Each time someone buys a book through my site, I make ~5% from the retailer.
2. You know, not very well, but I think its a cool perk to give to customers you interact with ("glad I fixed your issue - want some free stickers?"). My biggest ROI to date is from google adwords, but they're outrageously expensive, so I'm going to be focusing on natural SEO for this next semester.
cheers!