Now here's an untapped market if we've ever seen one. Telemarketing simulation video games typically fail because players think they're actually being marketed to. That wouldn't be a problem with a coat of Mario charm applied.
Who could be a better over-the-phone salesman than a chubby Italian guy with a thick accent and a lilting falsetto? Of course, Mario's limited vocabulary sort of throws a banana in these plans, although that doesn't stop most telemarketers.
"It's-a me, Mario!"
"..Is this a telemarketer?"