> I can create a free Discord for this right now and it'll cost me (and the people joining it) exactly 0€

But the reality is that you haven't.

We want to initially limit only to 30 spots to see how we could manage the community and the online events. We will evaluate if it makes sense to open more spots in the future.

The idea is to create "online coffee chats" where everyone is able to participate.

I have used Circle with other communities and I can say that the experience is much better than using slack or discord.

Great, where's your discord link?