I did eharmony for 3 months (big waste of money). Yes, there are attractive women on there with education and jobs, but they are holding out for mr. GQ lawyer with a BMW. Won't even respond or go for a cup of coffee, and it's an expensive site.
I was on ok-Cupid. Actually met and dated a nice and attractive girl off it, but it didn't work out ultimately.
Tinder is a joke. It's an app for sex where you have women who claim to not be looking for sex, but say they want a relationship. But again, can't get a response or they don't want to meet up if they are even somewhat attractive.
Part of the problem with online dating is your age is the first thing they see, then your occupation. If your single past a certain age, you get pigeon holed as being either unable to commit or not worth committing to. As for occupation, most women don't want to "settle" for regular blue collar joe who makes an honest living, they are looking for the hot-shot realtor in a Porsche/silver tongued ad exec type.