As you can see, there is a massive spam wave going on on Lemmey based instances.
This can be avoided by enabling CAPTCHA with signup and also LIMIT the registers per X seconds!
Currently the accounts are idle but this can change soon.. Please take action NOW!
Here you can find more info: https://fedidb.org/software/lemmy
The amounts of new accounts compared to the monthly active or even posts doesn't match one bit and has only one explaination