I have an issue, recently I've been getting bots that subscribe to the newsletter on Magento site, which doesn't have any guest email subscription forms.
You could only sign up for the newsletter if you create an account, but those bot's don't create an account, rather simply sign up for the newsletter.
I can't seem to trace how they end up signing up. Are there any Direct links bots could punch into URL that ultimately signs-up for the newsletter? E.G.: firstname.lastname@example.org
I see some logs where bots get a response