I don't think the founders (of small personal projects) need a lot of convincing, do they? "Hey, I'm doing a book and would like to feature you. Do you have 15

I don't think the founders (of small personal projects) need a lot of convincing, do they? "Hey, I'm doing a book and would like to feature you. Do you have 15 minutes to answer 6 questions?" You're going to get a 90% hit rate for side-project founders I bet.