Yes. I was a member of eharmony for ~6 months. Any connections that escalated to e-mail exchanges and one meeting in person did not pan out. I wish them all well except for the creepy college professor that wanted sexually explicit exchanges. They just weren’t my cup of tea.
The amount of interest was pretty decent considering that I was in my early 40s and didn’t post a photo. The profile generated was brutally honest. Why I was matched up with some people on the front end remains a mystery. I wouldn’t recommend the site.
My brother met his 2nd wife on match-com. Let’s just say that their marriage is complicated. A few friends have confessed to meeting their partners on dating sites. Some worked out and some didn’t. The success rate is probably less than those who experienced a chance meeting in person with their long-term partner.
For what it’s worth, I met my SO online, although it wasn’t a dating site. It was a fluke in timing and a glitch in one of the site’s servers. That was eight years ago.