Looking for love this Valentine’s Day? Millions of single adults in the U.S. – 30 million, or 1/3 of all American singles, to be exact – will go online to find that special someone. Match.com says new memberships increase 25% to 30% between Dec. 26 and Feb. 14 and connecting online is the number one way (31%) to get a first date. Meeting through friends ranks is second (25%), followed by work (8%) and bar/clubs (6%).

Related: Impress Your Date with These Surprising Valentine's Day Facts

Match, eHarmony and Plenty of Fish are the largest online dating sites in North America, but there are more than 1,400 sites devoted to cyber matchmaking. Most people think the $2 billion online dating industry started connecting wannabe lovers only 15 years ago but Dan Slater, author of several books including “A Million First Dates,” says that’s just one myth of online dating. Slater shares three secrets of the industry (full disclosure: Slater met his wife at a yoga class).

#1: Computers have been helping singles find love for decades

Slater’s parents actually met in the late 1960s thanks to a computer program called “CONTACT Personality Preference Inventory” at Harvard. They filled out a questionnaire and submitted their vital stats, handed in their responses and a computer algorithm tallied the results. Participants then received contact information for possible mates in the mail days, weeks or months later. According to Slater a Harvard student launched  “Contact” in 1965 and it was one of the first ever computer-dating services.

Related: Can eHarmony Help You Find a Job?

#2: Dating sites don’t want you to find true love right away

“The objective of these sites is to find you a mate but the sites also have to make money, and in order to make money you need to stay on the site,” Slater says in the video above. “So there’s a bit of a tension there between wanting to make the site work for you and wanting you to spend a few months and pay the $20 or $30 or $40 fee.”

Slater also says the online dating industry has become saturated from all the competition. Some online sites may eventually shutdown but others – like pioneers Match and eHarmony – are “like famous bars that will always be around.” He sees no change in the paid/free/mobile app online dating business model.

#3: No site can determine whom you are destined to marry 

Match and eHarmony may tout their high-compatibility rates but “science has found no support for these claims,” says Slater. A University of Chicago study last year determined that nearly 35% of recently married couples met online. The study was based on a survey of more than 19,000 people who got married between 2005 and 2012. But the research was paid for and commissioned by eHarmony and the report’s lead author has been a member of eHarmony’s Scientific Advisory Board since 2007.