What makes the 'deplatforming' threat viable is that so many critical aspects of an online business are a choice between private-enterprise players. Stripe or Authorize.net. AWS or DigitalOcean. GoDaddy or Namecheap.
As you suggest, they have no individual legal obligation to serve a business that may cause bad press/high risk/whatever. But when you can enough of them pointing in the same direction, it creates the chilling effect-- a business that's technically legal but can't get the services they need. It basically creates am unspoken private regulation well beyond the actual law of the state.
I tend to think the answer might be non-profit or state-run "service providers of last resort" -- charter-bound to provide service for any legal purpose, no matter how distasteful. Not necessarily cheap or slick, but they won't pull your plug because people complain about your content. Such a provider would defang the deplatforming strategy pretty fast.
As you suggest, they have no individual legal obligation to serve a business that may cause bad press/high risk/whatever. But when you can enough of them pointing in the same direction, it creates the chilling effect-- a business that's technically legal but can't get the services they need. It basically creates am unspoken private regulation well beyond the actual law of the state.
I tend to think the answer might be non-profit or state-run "service providers of last resort" -- charter-bound to provide service for any legal purpose, no matter how distasteful. Not necessarily cheap or slick, but they won't pull your plug because people complain about your content. Such a provider would defang the deplatforming strategy pretty fast.