Ewhoring is the strategy of acting or pretending to be for example sexy girl or even a sexy guy (mainly for gay dating sites) to make money by directing people to join a dating website you are affiliated with.
A good example is using fake pictures in a fake ad pretending to be a hot woman, then pick a prey from one of the hundreds of mails you will receive, then deceive this fool into thinking you will meet him and make all his dreams come true. Have him give you a camshow just so you can laugh while he’s in his underpants jerking and then persuade him to sign up — then block the bastard from your msn!!!