Adopted for Psychological research and medical testing

Has anyone ever heard of a situation like this? Or of people adopting multiple children of special needs, disabilities, or of color for money during the 90s?

I was involved in a closed very secret adoption that I feel had something to do with this. In total my adopted mom adopted 12 children. All with special needs or of color. At the time this was a "popular" way to make money. I know based off of the living conditions and how we were housed this was the only motive for the adoption. She didn't meet any of the qualifications for adopting and housing that many kids as a "single parent." She was very abusive towards some of us, typically towards me. Her excuse being that I "didn't bring in enough money." After doing some research it seems that alot of her abusing methods (a lot like in the book "A child called it") match similar ideas and themes to the "the little albert" project in which psychological tests were run on infants to provoke fear and negative emotions. Some of my siblings had many unnecessary surgeries and medical conditions that ruined their lives. Lots of "trial and error" procedures that resulted in two strokes for one of my sisters before the age of 16 and broken hips for my brother. To make a long story short has any one ever heard of something like this ? I've recently found my biological mom and she refuses to have a conversation about what happened. So does my adopted mom yet both of them are very afraid of me as if I'll do something drastic if i found out the truth of what really happend.