Do they really?
I am not being sarcastic. I cannot find a recent reference to this (everything seems to be from 2015), but given my experience getting my aunt away from AOL email: it seems horribly plausible.
"If you're interested in purchasing a plan that includes dialup service, please call 1-800-827-6364 (Mon-Fri: 8am-12am ET; Sat: 8am-10pm ET)"
I would not be surprised to learn that they still have millions of dial-up customers & millions on the new non-dialup plans.
https://www.cnbc.com/2021/05/03/aol-1point5-million-people-s...
As to dialup itself…
“The number of dial-up users is now “in the low thousands,” according to a person familiar with the matter.”
…but, yeah, it seems 1.5 million discerning customers are basically paying for AOL mail.
“There are about 1.5 million monthly customers paying $9.99 or $14.99 per month for AOL Advantage, said another person, who asked not to be named because the information is private.”
Which: nice business if you can get it.