aim to find a new set of 3-5 deeply engaged beta readers per iteration, which typically requires inviting 12-20 people who claim that they’d love to read it. Roughly half of them won’t even open the document, and another half will submit approximately one comment before giving up. So expect to invite about four times the number of potential readers as you hope to end up with. (Finding these people is less difficult than it sounds — more on that in a moment.)
