Yes This type of promotion policies should be stopped .These activities damage the reputation of ebay at a large .I have not got any BIG gifts like CAMERAS/ MOBILE PHONES from different promotions but received SMALL gifts like PENDRIVES/MEMORY CARDS etc.
If ebay staff can't handle sending/non-delivery gifts in time why the are using such kind of FALSE promises to the buyers OR there may be some chances of BYPASS ( may be the gift items has been marked DELIVERED but infact it goes to some other's pocket ) delivery of gifts in the name of buyers.