I doubt very much that Tom Daley and Lance Black chose a woman living in poverty to be their surrogate. Why would they?
The only person who can categorically say whether or not she was exploited is the surrogate. As she CHOSE to do it, and there is zero chance she's living hand to mouth in a trailer, desperate for money, it's highly unlikely that she feels exploited.
Likewise only the woman involved knows whether or not she requested not to be mentioned at all in public. People are making sweeping assumptions and judgements here.
Who is anyone here to JUDGE the CHOICES of this woman? You may not agree with surrogacy, but you don't have the right to criticise a group of individuals for their CHOICES, particularly when you are not privy to any of the information.
Discuss surrogacy all you like, but telling other women they have been exploited when they have made a choice is surely the opposite of feminism?