Free lottery games were all the rage online several years ago. The Daily Draw, Banana Lotto, Loopy Lotto and many others all jumped on the lottery bandwagon. They could offer free play simply by getting entrants to qualify their lines by clicking on advertising links. The most successful of the free sites was The Daily Draw (PDV Limited) who managed to produce a couple of millionaire winners. However, as advertisers became more of the value of clicks and entrants got bored of not winning, these sites soon faded in popularity.
That's not to say you can't play free lottery games...
Bingo sites like Rollover Bingo offer free lotto lines to players. Spend £5 and you get one free lotto syndicate line. Get 3 lines and that results in a free Euromillions syndicate line too.
You can still play daily free lotto at the likes of Kingo Lotto but even they seem to be fading out of favour. You also have to endure marketing messages in order to take part. The Daily Draw is running too, but it's a shadow of it's former self.
Up until the end of 2010 there was also Virtual World Direct - or the eLottery - you could get free lines simply by paying to play and then referring friends to develop a downline. If they paid and played then you earnt commission. Unfortunately the business was closed down by The High Court.