Listened to a presentation from Filtropur on a whole-house air filtration system to obtain a so-called $100 gas voucher. Learned afterward that it was a program from International Rebates, LLC wherein you fill out a rebate registration form and, 8 to 10 weeks later, receive another form. You then mail in one receipt for $10 in gas per month for 10 months and receive a rebate check.
I mailed the form in on 12/16/13 and have heard nothing from the company. There is absolutely no way to contact them by mail, email, or phone. While trying to find information for them, I found several complaints on this site as well as the Better Business Bureau. I don't understand why they would offer this rebate and then never answer mail.