Screenshot attached. I've been getting a handful of signups to my email list every few days that all have the exact same format of email address, with just the number being different at the end. Any idea what this is about or what these things want? Or what I can do to block them, or if I even want to block them?

I assume everybody in this group is on my email list and reads my emails religiously. It's a stupid thing to assume, because I know for a fact it is not true. So, let me tell you about my current offer, the one I've been advertising to my list for the past few days, because it's something you might want, and you might be upset with me if I slip it by you. My current offer is called Daily Emails 101. As of today, the sales page for this offer is converting at over 28%, on the few hundred visitors I've driven to it so far. That's because... well, I won't tell you. If the implied promise of "Daily Emails 101" appeals to you, or if you're curious to see what a 28%-conversion-rate sales page looks like, then take a look here. Just beware, because you might find yourself pulling out your credit card. Don't say I didn't warn you.