This is where commercial trade in human eggs and embryos leads. Obviously and predictably.
I don't see how anyone who has used donor eggs (unless from a personally known donor) can be certain they weren't part of this. There's not a clinic in the world that would admit to it, so just because your clinic says they follow strict regulations etc, it's honestly completely meaningless.
But still there will be people saying "unless youve experienced the pain of infertility, you can't comment". No. Desperation cannot not justify exploitation.