I never actually experienced these things but I had _planned_ to, so I have done a lot of reading/thinking about it... interesting topic!
For example, we were ready to start an IVF cycle as soon as my next period showed up and... it turned out I was pregnant! Very convenient. Got a $25,000 refund. I was sort of disappointed in a way because we'd also discussed doing embryo donation for any we didn't use... It really helps other infertile couples and it's cheaper for them than adoption or even using donor eggs (amazing eh??)
Years ago before I even knew I had fertility issues, I wanted to donate eggs, but was disqualified because my brother has a disability which I may or may not be a recessive carrier for.
I was most interested in egg donation because of the potential to help other women, the money was secondary. It's definitely a big thing to consider. The hormones can make you really sick and miserable for months, and the egg extraction needs to use a wide-bore needle so... ouch!
I'll be watching this thread with interest.