Edit: FetLife is based in Canada. Are checks a thing there? (honest question from a European who has never even seen a check)
Cheques are very much still a thing in Canada. Especially for private rentals.
Really? I haven't seen a cheque in years (also Canadian). I've been renting privately for years, and it's always been accomplished via email money transfer.
I'm sure some, but if even half the people who subscribed by card sent in checks, it's better than nothing.
Half would be a miracle, with that level of friction.