Rebates and/or free shit with products are just scams. It's almost always farmed out to a shady fly by night third party that makes you jump through hoops and bend over backwards to get whatever pittance the manufacturer promises you.
In some cases, the manufacturer is extra slimy and slips in a "terms and conditions" item where claiming the rebate alters your warranty position, and before warranty protection laws, void the warranty entirely. I've had both happen multiple times, as well as retailers like Newegg try to deny my RMAs for defective product, or subtract huge sums of money from defective products because of the rebates or free stuff they tie to the product you can't opt out of. Other times, they'll do a catch-22 and require something like the physical barcode / serial number from the product box to redeem the rebate and later void any RMA you try because "the barcode or serial number is missing."
Years ago, I bought a 7970 GHz Edition card from Newegg that came with a "free" scratch off game card to redeem on AMD's website. The card was VERY bad, grey streaks on the desktop and polygonal corruption in games. When I tried to RMA the card, they immediately docked either $100 or $120 for the game card. I knew this was coming and didn't use the "free" game cards. I had to call up customer support and fight with them to prove I didn't use the cards. Otherwise, I was going to have to fork over an additional $100-120 to get the card RMA'd. They RMA'd me a shit used refurb card that was even more broken, so I sent it all back, demanded a refund and told them to go pound sand. Got an R9 280x from elsewhere.
Seasonic rebate was nice to me, it says to read details carefully i missed part of the barcode or some shit on it but, had me mail something in and i did get my debit card rebate! i just did another one and tried to not make the same mistake. i should check in on that next week
This rebate was a paperless one were you just send the picture of your invoice, and box label, maybe something else, so hopefully everything is fine.
Guess I'll check the post office this Saturday to see if it came or not. Want to get the parts to install a 2nd m.2 slot on my GL65 Leopard MSI decided to leave off.