But this is in the US. I guess it's different depending on where you are.
Ditto in Canada.
Over here in the UK, we have very strong consumer protection laws, and if I wanted to pursue the matter I expect I could have eBuyer's 28-day policy overturned even though I have agreed to it. It is very similar to Microsoft's EULA, which has been overturned before as being unlawful. Strictly speaking the place that sold you an item has to fix/replace/refund the item for 6-years (depending on the warranty length).
As far as Gigabyte charging their customers for P&P, this is totally unheard of. I have had large heavy CRT monitors collected and delivered back free of charge by Samsung in the past, and the only fauly memeory stick I have ever bought was sent back to Kingston, they even payed my Â£0.60p postage via cheque when the replaced the RAM.
I suspect that GBT Tech are just the people who operate on behalf of Gigabyte in the UK, there may be a different company in the US and Canada if you dont deal directly with Gigabyte.
This would be just like Rexo who repair Samsungs drives in the UK.
Although Rexo are very very easy to deal with and have a quick turnaround and DONT charge for sending the item back to me.