dating websites....are they worth it?

Is there really any point of joining any dating websites?
Even the ones who claim to "match" you to someone of similar interests?
Speaking from recent experience of "just browsing" certain sites, I would say no they are not. Also, the last person I saw for any length of time, and just "left"...with no actual splitting up involved....I met in person
I know that some people have gained proper working relationships through dating websites, but just as many ...if not more seem to be disappointed.
One site I "browsed", (problem is you have to join to browse,) suggested I send a certain person a message, as we were a "match".
The person in question I have actually met, and I know him to be a player. In fact he told me how he usually "played". He would have at least one woman who he would be exchanging e-mail, IM and maybe phone calls with, but not actually met, at least one would be lined up for a first date, and another he would be "getting into bed". He admitted that no "relationships" lasted too long. In the time I knew him, he also started up an affair with a married woman, which to my knowledge went on at leas v3 years, maybe is still happening, I don't know, I broke contact with him as his antics began to disgust me even more.

I truly would love to find another lovely man, like the last one I saw...who stuck around for longer, but I just don't believe that anything online works well.
After all, the best relationship I have had was one where I met the person in person in the first instance, by encountering them actually on the street where I live. I doubt that would happen again....unless he came back from his home country, which is unlikely.