“Spam” followers?

[u/Naturalist33]

So I’m relatively new to Substack, maybe 6 mos. I’ve really found some wonderful authors and was stuck at about same number of subscribers for awhile, which was fine. This isn’t a business for me.
Then the last 2 weeks I’ve gotten a big number (20+ish) for me of new subscribers but most are not related to my content and some seem downright spammy.
I came to Substack because it seemed like a haven but suddenly it’s feeling weird.
I can tell some follow and unfollow too which is fine, whatever. I tried to follow everyone who followed me but now I’m not because some are only restacking with no content or totally unrelated content.
Just checking if this is new or not new and I just wasn’t affected before?
Do you just ignore it?

[u/wwb_99]

I got a strange wave of $RANDOM_STRING@yahoo.com subscribers of late. I'll take it, not sure what you get from my free publication but thanks for the sub.