Sure, I definitely don't begrudge them their choices! It's their product, if they think this is a good way to bootstrap it, that's up to them.

But my feedback is that I think a better way to bootstrap would be to focus on figuring out what book enthusiasts dislike about the current products in this space and building that (for what it's worth, I think they're also doing a pretty good job of this!), and on figuring out a financial model to sustain the project for a long time.

But I can do it that way when I build a product like this, they certainly don't need to care a whit about my feedback.