I have had bad experience with their apps, I don't particularly remember what it was as it was a few years ago but it was their notes app. They limit some basic features and push you to buy their premium versions.
For a bit, I put a bell on my cat. He's a house cat, I just wanted to hear where about he was going through the house.
Within a few days he had figured out how to walk around the house without causing the bell to ring. The only time I'd hear it make a noise is if he had late night zoomies and go running up and down the stairs.
Another consideration - imagine having a phone around your neck that beeped fairly loudly at an annoying frequency each time you moved. Its really annoying and hurts their ears (their hearing being more sensitive).
Bells on collars don't solve the problem and make it worse for all animals involved.
The wording is not clear. I doubt that it has the 'opposite' effect. I think they mean that the ones with bells brought in the most catches with the suggestion being that the owners put bells on their cats because they bring a lot of catches in the first place, i.e. the best hunters get bells.
Anecdotal - I had a account in one of the largest english mastodon instances for a few years now and have seen multiple waves of twitter exodus into mastodon. Server becomes extra lively for a few weeks and then it returns to normal. None of these people last.
Mastodon supports both migrating your profile (followers and block lists, as well as metadata, but NOT content), AND exporting your content (posts, replies, and media uploads).
The process is pretty straightforward, and I've done this myself. You will lose your old content's persistent URL references, though federated copies of that content may still be accessible from other instances.
Must be, it's pretty crazy. No masts and what appears to be a gangplank full of people. What's interesting is that on a small screen it gives just enough of the right type of image to give the feeling needed.