Actually, most businesses honor their rebates. I've had trouble with "Office Depot" and "Pep Boys"
Antec and EVGA are always right there in decent time.
Years ago, when I bought my eMachines T-5026, there was a rebate on every item in the system, I received them all.
The only computer product manufacturer I've had trouble with is Cooler Master. Their customer service sucks. They refused to send me a 10 cent rubber foot for a case. There was a rebate on the case also, to get that, I had to call Newegg customer service, and have them leverage my 10 bucks out of CM.
I won't buy their product unless it's on a giveaway price sale, and then not through the mail.
Antec though, completely different story. Superb CS, and they pay up on their rebates, every time.