The problem is that there is also tons of services that promised not to enshittify but then changed their minds when they thought that fucking over their users would be more profitable. That includes even Google, look up their early views on ads. Because of this those promises are often (IMO rightfully) ignored as hot air. The only way to ensure that your software doesn't get enshittified is to legally guarantee that you are not dependent on a single vendor for future development - the most effective way to do that is insist on open source software.