I'm not sure what imbalance, exactly, that you mean, but I don't see anything of the sort as the reason that online dating isn't going anywhere. The fundamental problem I see is that meeting new people is hard. Particularly after school, with a full-time job, if you recently moved to where you live, and if you don't live in a city (being close helps, but it's not the same).
Part of my problem with online dating is it's too much like looking for a job. You have to fill out forms, put in all of your data again, and perfect your wording in multiple locations. Yet, you're underqualified for who you want to be with and the only offers you get are those which can't take seriously.
Im referring to the fact that on most dating sites you'll find "n" male profiles - and something like 0.5n to 0.7n female profiles. Dating for LGBT works brilliantly - and the only location based dating/hookup apps that I know of that actually took off are targetted at LGBTs. The heterosexual space on the other hand still suffers from the same old - problem as high school.
I don't know if there is an imbalance either, I do know that in certain circles it's culturally unaccepted. Many people I know consider online dating to be something for losers.
Interestingly, this can easily be turned around: cherry pick applicants, make it invite-only, or make it exclusive in any other way. When 50 "cool kids" are in, the rest will be lining up.
On what basis are you saying that "online dating isn't going anywhere?" One could call Facebook the most successful online dating site, one-third of married couples last year met online, and couples who meet online are less likely to divorce. That sounds pretty impressive to me!
I mean that online dating is not leaving us; online dating is here to stay; online dating is obviously a service that people like using and get something out of. I was disagreeing with the parent poster about why online dating is here to stay, not that it is here to stay.