Well, I think you're making a very foolish choice. This is a very common scam which has been practiced for years and years, targeting people looking for various kinds of work from telecommuting to escorting. This isn't like investing in the stock market or making a bet on a horse, it's like putting ?300 on a street cup and ball game. You will get nothing for your money, guaranteed. I just received an email from someone who says she registered with them a month ago and has got no work and no answers when she calls them.
Richard Branson didn't get where he is by throwing money at anyone who told him what he wanted to hear!
I suppose you could use the argument that people often use to explain why they play the lottery even though they know it's 'a tax on people who are bad at maths': "I know I won't win the jackpot, but I'm willing pay ?1 for the dream". Except in this case the cost is much greater, the chances of winning are lower, and the dream isn't as good.
Escortopia is not the most believable agency. The most believable ones are the ones that have been around for years, follow established legitimate business practices, and have reports from clients. Unfortunately they don't employ men, but there's a very good reason for that, they won't make any money finding work for men!