The premium subscriptions neobanks offer usually don’t win on features but solely on nicer looking cards. The N26 or Revolut Metal plans, for example, don’t offer any additional features that really justify the ~€15 / month price tag. They do include a nice looking metal card though – that’s what people pay for.
I also think this makes Twitter’s other subscription offerings, like Super Follows, Revue, etc., more attractive, not less; the biggest challenge in running a subscription business is earning that first dollar, but once a user is paying it’s relatively easy to charge for more.
Subscription businesses allow you to distribute portions of your revenue to people who add value. This isn't rocket science this has been the business model for cable businesses for decades.