Eh, I question the list here. Why? Because they're all startup founder focused sites and communities.

Unless your product or service is aimed at other founders, or a techie focused audience in general, that's not where your customers are. Advertising there is like a game developer marketing their game to other devs or a writer marketing their book towards other writers.

What you really want to do is figure out who your audience actually is, figure out where they hang out online, and promote it there. Niche specific forums, subreddits, Discord servers, social media communities, etc.

That said, there's no real harm in advertising in these places, and other founders can give you useful feedback.