Alladvantage is basically like being paid to watch ITV but on the internet; you are paid 31p/hour (50 cents/hour) for having adverts flashed at you from the bottom 1/8 of your screen; you can turn the advertising off but you are not paid for time when the advertising is not shown. I've not found the advertising bar to be obtrusive but having said that 31p/hour does not cover the cost of the 'phone bill but it is better than 0p/hour.
I think
Alladvantage would be particularly useful for university students who have access to the internet which they ddon't have to pay for - you may as well pick up �80/year through using
Alladvantage. Also it is worth noting that you are paid referal fees of about 6p/hour any of your referals spend on line which is quite good.
Overall I would say sign-up you don't have to use it all the time or at all if you don't want to but even though the rewards are small they are better than not being paid at all.