All eyes are on the BNB due to the increase in Ethereum's gas fee. Thinking about the beginning, it can be understood that the BNB's gas free is increasing day by day. Although I don't know the exact reason behind it, the curiosity is there.
Maybe what you mean by free is low cost. Because I see nothing is free of all blockchains. But why has the BSC blockchain transaction fee increased, because the price of BNB continues to increase. If we look at the cost based on BNB, it is still the same, namely 0.0005 BNB. Except sending any coins with BSC blockchain source to Trust Wallet, Tokocrypto, SafePal. Because all three platforms are the source of Binance or so-called internal wallet.