In the past, I've had accounts that crossposted to Twitter, but I've ultimately either disconnected the crossposting or let the accounts go defunct. And gradually I've come to the conclusion that crossposting undermines the goal of building a better social media ecosystem. It provides people with an excuse for staying on corporate social media and encourages them to see it as your responsibility to deliver your posts to them wherever they already have an account.
I'm not saying never crosspost. I'm willing to grant that there are probably some circumstances in which a limited degree of automated crossposting makes sense. But if your goal is to encourage people to migrate to a healthier social media environment, then it makes sense to be very thoughtful and restrained about how you mirror posts from one platform to another. And I don't think we're thoughtful enough about it. I certainly wasn't.