There is a US-based Internet dating service specifically targeted at wanting spouses but I can't remember its name. Saw an ad for it on TV a few months ago.
In Quebec, I have used Reseau Contact on and off over the past 4 years. Through RC, I've met 5 women, two of whom I laid. Although RC caters mostly to singles, there are nevertheless a few hundred married women members. But the man-women ratio is like ten to one.
If I had to contrast Internet the dating with hobbying, I'd say the dating is more fun because its a real hunt. When you score, you get true GFE instead of the ersatz. The downside is that its more time consuming to seduce a women than to do research to find an SP. Cost-wise, I think it turns out equal because, as any SP will tell you, dating a women is as expensive a proposition as paying an SP.