I was on another forum when they did this last year, there was also a thread
and but it turned out everyone needed the same ones, and had tonnes of the
same ones spare. So no one actually got any further with it.
Like you know where u need 3 of a colour to win a prize, well they print millions
of 2 of them but only 100 of the 3rd one (or however many prizes there are) so
everyone has the first 2 and is frantically searching for the 3rd to win, but since
there are only 100 of the 3rd one printed (example 100 ipods to win) there isnt
much chance of you finding one!
Its a sprat to catch a makerel, marketing ploy. Think of all the people who are
buying mcdonalds more often in order to get the stickers all over the UK,
the amount of money they rake in from millions of extra sales during this period
gives them a good few ££££££'s in their back pocket while covering the relatively
small cost of the prizes on offer.