I’m bridging my main Mastodon account with bluesky, but I fully expecting this service to disappear soon enough. I remember when Twitter, Facebook, and a bunch of other sites allowed crossposting until someone realised they were driving traffic away from their own site and shut it down. I think it was Facebook. I can’t remember. Same is likely to happen here, or they’ll charge an exorbitant fee for API access like Reddit. For now though, it kinda works.