In casual conversation, I've brought up the fact that James Dobson help found eharmony and that as a result, eharmony is run using his evangelical social principles. I will not go as far as saying it is a Christian dating service, but I will say that eharmony deliberately excludes gays. Nobody ever believes me.
eharmony discriminates in the beginning. When you join, you are offered two options, man seeking a woman or woman seeking a man.

eharmony is all about social engineering, by excluding gays they deliberately seek to devalue the lives of gays Americans. People notice this kind of hate, and they sue.
...on Thursday, she [Linda Carlson] filed suit in Los Angeles accusing eHarmony of violating a California law that prohibits businesses from discriminating based on sexual orientation.
I chuckled when I read E-Harmony's response:
...He said the law prohibits only arbitrary discrimination that lacks a legitimate business purpose.
Right... we don't discriminate on accident. We discriminate on purpose.
eharmony does not end its discrimination with gays, there are religious tests too, but they are less prohibitive. Eharmony's 436-question test asks your religion and religious preferences in several places. I filled out a profile while writing this post (to the chagrin of my wife) - and yes, religion is an important part of the onboarding process. Some Atheists have experienced problems using eharmony; the problems pale in comparison to outright exclusion.
I'll post a few of my eharmony matches if I get any. After all, how attractive can a tall (6'2"), well paid, healthy, intelligent, well educated, outgoing, caring, compassionate, Atheist be? It is a good thing they did not ask my weight.