Why do bots leave fake emails on subscription forms?

Question

Information Security

Good day!
There is a small landing page with a subscription form for an email newsletter.
Bots sign up several times a week.
Example:
Name: Veda Johnston
Email: [email protected]

Names are always Latin and similar to American ones, emails are always quite long and often with non-existent domains.
Question: why is this being done? What is the practical benefit of bots from such "subscriptions"?

I apologize if the question tag is not correct.

Answer 1

If anything, then a large number of people have a second mail that they use for random registrations and subscriptions, most often indicating random names. For example, I have such mail signed with the name Ahmad Shermodan. So, I repeat my question - on the basis of what did you decide that this email is part of some kind of bot network? Give me your site, I will subscribe from my second email and with a >90% chance it will also be marked as inactive.
In most situations, a characteristic feature of bots is mass registrations in a relatively short period of time. This is done to generate valid fingerprints, that is, you register accounts and drag them around the Internet by randomly subscribing and viewing everything you can, then you abuse these accounts for your own purposes.
You don't have to worry about your site, because most likely this is not your case.

Answer 2

Then at once from all emails they will press the button this is spam and your mail domain will be banned