NEWSWEEK -- May 31 -- The wave of the future, perhaps: free internet dating. In April, Craigslist saw 2.6 million personal ads posted, up from only 970k two years ago. PlentyofFish.com, a free dating site that was launched in 2003, now brings in 200k U.S users a day - and $5 million to $10 million in advertising a year according to Markus Frind, who runs the site by himself. "I think all the paid sites are going to go away, he says" Even Match.com is offering discounts to subscribers: six months free, if you don't find Prince (or Princess) Charming in the first six months. While the online dating industry has been enormously successful so far.