What Mc Leod has found, though, is there aren’t a lot of young people (18-35 year olds) on dating sites, even though they’re always online and technically savvy. They don’t like to fill out profiles and a lot of them, believe it or not, don’t want to say they met someone online.

OKCupid, which was acquired by last year, uses a fun question-and-answer system to build up your profile, so it skirts the tedious survey required for a profile.

It’s casual and free – but because of that, there are a lot of people using it who aren’t serious – and there are a lot of dead profiles.

“It spreads like wildfire when launched – especially if at a school – but does not retain users,” Mc Leod explained.

“Users join, list their crushes, and maybe have a couple successes – but have no reason to go back to the site or stay engaged.

Blowing cyberkisses has become a popular pastime in emerging markets too.

In countries and cultures in which arranged marriages are common, sites such as India's Shaadi and Bharat Matrimony, which boast many millions of clients, are a big hit with young people who want to influence how their marriage partners are chosen. There is no escaping all the ooey-gooey-makes-you-just-want-to-barf ads and promotions for Valentine’s Day.As our lives become increasingly busy, it seems that the easiest way to meet people is online, a fact that many entrepreneurs have also noticed.There are also some cooler new sites out there like How About We, dating.and Sparkology, all with interesting business models.How About We is in NYC and very casual; it’s activity- based rather than personality-based, and is potentially a great way to meet people –as long as you’re cool about meeting up with random strangers.Grindr is doing great, but Blendr, which is for straight people, has not been successful.