Wait, isn't cross posting counterproductive where there is already a bridge? 🤔
Cross posting / gateway between social media protocols is an important way for open protocols to get critical mass. I just came back across the micro.blog service that has support for activitypub, bluesky, and now nostr!
https://www.manton.org/2023/05/31/introducing-nostr-crossposting.html
Discussion
Depends on the direction of the bridge id guess.
And there is good reason to not rely on a centralized service like mostr because it can be a single point of failure for technological or political problems.
Umm.. x-posting is bs, bridging is bs, maybe clients that can aggregate - for now ok.. but really, why waste the energy instead of just embracing an open protocol and making it work?