Ouch. I know you didn't wanna let them go. That has to suck.
So Avast, my run time monitor, was telling me I had a threat blocked this morning. Which it only does if something tries to hijack my computer or download itself without authorization. So if you had a browser lock-up this morning you might want to do a malware scan.
As for that 2 dollars, you don't want shady advertisers like these on your site guys. Even if a small fee can help you (you personally) avoid them for a year, people who are new to the site and might not be convinced they want to pay anything probably won't be won over by malware. Jaxel made the right move giving them the boot.