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.
I'm assuming you don't mean BNB gas fee, but
BSC gas price. If so, then BCS transaction fees are increasing just because the BNB price is constantly going
upward on the market charts.
The London hardfork implemented on the Ethereum blockchain in early August 2021, has already
shattered people's illusions about cheap ETH transfers. A month ago, the vast majority of ETH holders thought the Ethereum gas price would be low, but the current reality has shown a
different picture. Therefore, traders and investors turned their attention to Binance Smart Chain as the main competitor to Ethereum. As a result, BNB was pumped a lot even when compared to other altcoins.
Yesterday I sent a couple of BSC transactions with a gas price of
5 Gwei and they were accepted almost instantly. That is, the BSC gas price did
not increase if measured in
BNB, not in USD.