Sounds like the next feature idea for Twitter Blue or whatever it's called now. Usually it's why you don't make these kinds of services because the company can just make it's own iteration.
That’s always a risk with building on any platform. The benefit of building on them is the reach but it can also take away your selling point. In that case you usually have to double down on features that are too power user specific and unlikely to be added by the platform themselves. It’s always a double sided sword.
