Since BNB is not part of decentralized crypto industry rather a centralized coin. So its nothing new that its supply or other parameters can be manipulated by Binance.
Binance has everything now, both a centralized exchange and Dex both of which are doing very well, so there's no reason to manipulate this on their own because they basically want to grow like the others.
You are right, they are doing everything right to grow. On the decentralized dex exchanges, millions of transactions are made during the current day. They are open to all kinds of innovations, if there is a rise again like in April, BNB will be one of the fast-reacting coins. I can say that their strategies for now are positive for me.