The issue with eHarmony is slightly different than the issue with abortion. In the case of eHarmony, it could be argued that they were denying access to already existing services, based on the demographic of the people who wanted to use the service. This would be on par with a clinic that provides abortion services refusing to give abortions to women who had fewer than 4 children, for example -- and that is what the law is designed to protect against.

However, the law says nothing about requiring a clinic that does not already provide abortion services to do so -- just as all non-dating sites are not suddenly required to provide dating services to gays -- nor is any Supreme Court justice in the near future likely to rule that this is what the law means.