"We're WallyWorld, and we control 99.867% of the retail market for your product. If you don't offer a rebate, we won't advertise your product, we'll advertise your competitor's product. In fact, we won't even carry your product."

If you're referring to Wal-Mart on the sly, you're very wrong. Wal-Mart strongly discourages rebates of all forms, demanding that the retailer sell to Wal-Mart so they can sell the product to the consumer for as close to the "after rebate" price as possible.

It is a primary, elemental, core strategy of theirs to have "Always low prices" right there in the store, NOT "always low prices after rebate".

You will very rarely see anything at Wal-Mart with a rebate for this very reason.