Yes.
She broke up constantly with me. I ended it because of her stupid mind games. Online dating sucks.
People can sit behind a screen and pretend, whereas it turns out they were dating 10 other people.
No. Never have, and never will. Not even slightly interested in online dating. I much rather prefer dating people who I can regularly enjoy face-to-face contact with (by that, I mean going out with, not Skype or some shit).
I used it for a few years back before I was married. I don't feel like it worked out well. Sometimes you would meet someone that you were completely compatible with, but when you met there would be no chemistry. Most of the people were flaky. Some people used fake or old pictures. I felt like I was in a used car parking lot and someone was trying to sell me a lemon. I may have had one relationship that lasted a few months, but most disintegrated before we actually met or they were one night stands.
Never had any interest for it tbh. I can't seem to gather a reasonable outlook or perpective of those who actually prefer it over "real life dating". It doesn't really seem viable.