I don't really see a problem with them doing that. I'm not even sure I'd consider it manipulative. They walk through some design decisions, talk about their cod

I don't really see a problem with them doing that. I'm not even sure I'd consider it manipulative. They walk through some design decisions, talk about their codebase, at the end say "if this sounds interesting to you, think about working for us." Just because it benefits them doesn't mean it's exploitative or bad.