I'd guess I've received (maybe) 50-75% of those submitted
and you're right about the lack of help when checking their status. I can tell you also from experience that rebate offers very often precede price cuts anyway. I believe manufacturer's might just offer rebates just before they lower prices in order to squeeze the last dollar they can with the higher price. A little patience often pays off. Try looking at rebate offers for items you're not terribly interested in and then checking the prices again after the rebate offer expires.