Buyers remorse after purchasing pornography? I don't know why you're surprised.
Or regular embarrassment, or I don't want to "get in" to onlyfans, just this one time then I'll delete.
I suppose that hinges on what "a lot" means in that comment. If it's "a lot" in absolute values, that's very plausible. If it's "a lot" as a percentage, OnlyFans would have to have a high rate of account closures.
OK, I asked. "A lot" is about 20%.
Perhaps to avoid unintended rebill or make it less likely for a loved one to discover it.
Probably a combination of being a subscription model with auto-renewal and people regretting wasting money for this type of content.