No, there are other hosts. But... is it really so wrong to be glad that someone is trying to arbitrate this? Parler was a persistent host to exactly the kind of violent rhetoric that turned into Wednesday's coup. At some point we have to make a call and shut stuff like that down, right?
I mean, yes, it sucks that the overlap between "conventional republican politics" and "rhetoric inspiring real life violence" is so high. So surely there is some friendly fire here on speech we'd like to keep. But... I don't see why Amazon should be responsible for letting this fester like it has either.