None of those instances validates anything at signup.
Source: https://lemmy.fediverse.observer/list
In contrast, here’s the list of the top 10 real instances based on user activity (with lemmy.world being #1, followed by lemmy.ml and beehaw.org):
Here’s a link to a post that was made by the mod of lemm.ee, who says in the post , “There is currently a huge wave of automated spambot sign-ups on other Lemmy instances.”
https://lemmy.world/post/378640
In the post he also includes a list of instances that he thinks are affected with these bots. Here’s the link to that. It looks like the instances that are in your top 10 list are on his list too.
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I’m not sure how what you posted proves what you’re saying?
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All I see is proof that the biggest instances have the most users.
Your statement doesn’t account for thousands of people who had issues during signup. Nor does it account for thousands of people who have accounts but don’t post/comment/interact.
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This is an opinion without anything backing it up but a grouping of instances with a lot of users. I believe that there are a lot of bot accounts, but you need to do more than just state a hunch, friend.
I suspect the bot problem will be real for a bit before coded mitigations/solutions are developed.
Considering how much new content I’m seeing on various instances, I don’t have any reason to doubt that large numbers of actual people are creating most of the new accounts.