Unfortunately I made a contribution as well without having read this thread first, thinking that this is a well-known tool.

Received emails for my invoice and successful contribution, but nothing- no temporary or permanent key. Junk folders of course have nothing either.

That someone received his key only after filing a dispute, seems to suggest that intentionality is involved in the missing keys and radio silence. That or they are prioritizing members who withdraw their payment. But it really doesn't take much effort to properly generate keys. So either way it looks suspect on their part.

Will be issuing a chargeback on my CC, suggest y'all do the same.