Janice
Restricting buying on any stock in the history of the stock market while allowing all the selling to continue would affect any stock in the history of the stock market. That would hold true for Amazon, Pfizer or Smith Corona in 1973. I am quite surprised you don't see this. You said, "I don't know." Really.
With that said, restricting buying on GME might have stopped some people from committing financial suicide but I am shocked that you wouldn't know that it affected the stock price. If tomorrow, FINRA announces that no buy orders would be accepted on Amazon, Amazon would have 0 chance to trade up for the day. I hope I solved your problem.