It’s instance specific. I’ve had a semi abandoned account in one of the NSFW instances since 2022, posted one or two comments, forgot it, remembered about it in 2024 and still logged in.
I know some instances will cull accounts that are 6+ months old with 0 posts, but that’s a different thing, too.
I’ve had my accounts blocked like that a few times when Mastodon was relatively new. I guess it’s an instance-specific thing?
I don’t remember the exact instance any more, since I never went back there, but mastodon.social doesn’t seem to do that.
It’s instance specific. I’ve had a semi abandoned account in one of the NSFW instances since 2022, posted one or two comments, forgot it, remembered about it in 2024 and still logged in.
I know some instances will cull accounts that are 6+ months old with 0 posts, but that’s a different thing, too.