Yes they can and do so reading carefully thru the terms is important.
You mean shielded from getting contacted by the crackpots, or just from ugly men?
So weird! But not surprising...I mean, it's the internet and people are trying to make money.
That's why I never liked the concept of EHarmony--I like to be able to view everyone on the site (filtered by age and location) not just the people who they "think" I match with. Even I noticed in match, the "daily 5" they sent me were hardly ever people I would pick, so those math algorithms don't prove everything.