Typing in a box on a website provided by someone else can be done by practically anyone, even the boss themselves at a pinch. Heck, some of them love doing that.
Maintaining a server (or a service on a server) requires someone with more skills, which generally costs more money.
Some smart entrepreneur could offer a Mastodon-server-in-a-box service, where companies only pay hosting fees for company-name.social and a social network employee.
all cost more than just making an account on established service.
The cost of changing from Twitter to whatever is probably smaller than half a year of selfhosting or aaS.
Typing in a box on a website provided by someone else can be done by practically anyone, even the boss themselves at a pinch. Heck, some of them love doing that.
Maintaining a server (or a service on a server) requires someone with more skills, which generally costs more money.
Some smart entrepreneur could offer a Mastodon-server-in-a-box service, where companies only pay hosting fees for company-name.social and a social network employee.
all cost more than just making an account on established service. The cost of changing from Twitter to whatever is probably smaller than half a year of selfhosting or aaS.