Online Dating Experiments– Science or Deception?

Okcupid, an online dating site, just posted an explanation of how they “experiment” with their users to “test” their algorithm.  See Experiment #3 about how people were matched, but didn’t really match. Is this really science?  Is this a violation of ethical behavior?  How would you feel if you were the “subject” in this experiment?  What other ways could have Christian Rudder answered this question besides deception? In this interview, TLDR reporters ask questions about the ethics of this “experiment.”