There is no clinic that will give you 25,000. Most advertisements say make up to $30,000 donating your eggs. By this they mean do it 6 times and you will get that much.
People also have a misconception that being a surogate is the same thing. That does pay 20,000 to 30,000. But you are carrying a child for someone.
In some rare cases there are donors that get particularily more than others. These are generally Asians at MIT or in some cases like possibly your friend the couple seeks out a specific person.
In my case it was totally anonymous. There is no way they will ever know who I am. There is a legal contract stating even if a law is passed that says donors can access the info, I still can't. I like it this way. I wont even know if the couple got preggers. Reason behind this is because I did something awesome for a couple. I gave them the opportunity. But to find out it didn't work would make me sad for them. I would rather not be sad.
Anyway, my sister got $14,000 from one couple by donating for them twice. Had a kid and then wanted the kid to have a biological full sibling. Pretty cool if you ask me.
Anyway, totally worth it.