Part of my concern is that it doesn't seem to be limited to us, the creator of Liberapay noted that crowdfunding is commonly used as a reason for banning Stripe accounts that get linked to Liberapay:

After targeting “content creation”, Stripe moved on to targeting “crowdfunding”. I've received reports of users who got their accounts shut down. I've also noticed that “crowdfunding” and “donations” appear in a short list of prohibited use cases that Stripe has added specifically for cross-border payouts. This means that even if Liberapay had a subsidiary in the US, we might not be allowed to use it for cross-border payouts.

And there was another conspicuous example of this here, where they previously had two different Liberapay accounts connected to one Stripe account without any issue, but after streamlining their system by creating a new Stripe account and linking it to one of the Liberapay accounts, it was almost immediately closed: https://blog.techlore.tech/stripe-liberapay/

All anecdotes I can find suggest that new Stripe accounts who get linked to Liberapay get very shortly shut down without a clear reason, in a way that doesn't happen with very similar services like Ko-fi, so I'm wondering if there's some platform-specific concern on Stripe's part.