Originally Posted by
bzbatl
So if it doesn't mention it (as I've found) then it should be fine, or will a lengthy fight with the wonderful Delta staff ensue?

Correct. For example I've purchased Home Depot gift cards through skymilesshopping, airmilesmart, and aadvantageeshopping. The first didn't mention gift cards, and I got the miles. The second says you get half normal miles, and that's what I got. The last sometimes offers miles in Q4 and sometimes doesn't. The rule is always stated next to their Home Depot link. The exclusions are always mentioned next to the link to the merchant, as far as I can tell.