I won't be doing this, but good luck i personally like my own identity my own, meaning if you have my address i have given it, they sell on your address, so you get loads of crap through the door, good luck getting to £50!
i've been doing yougov for about 2 years now and have £27! takes so long to fill them out sometimes too! probably going to be another 2 years before i get my £50 as that's the minimum they pay out on.