Thanks for the compliments! Yeah, I've had a lot of contacts and a fair amount of donations, too. I'd encourage any FontStructer to spread their fonts on such sites, they can be a nice source of revenue :)

There are far too many examples to list, but some examples include:

Vermin Vibes used on Excision's "Shambhala Mix 2012"

Xero's Theorem used on Datsik's "Firepower Tour" flyer in small quantities

Vermin Vibes on some versions of the album cover for Davido's "Omo Baba Olowo: The Genesis"

Manly Man Font for all titles, video headers etc of the website "Cook Like Men"

As said though, there are hundreds, maybe thousands of people using 'em. I've also had contacts from lots of websites, companies, school projects, Call of Duty clans, even a teen safety group! :P