I don't know how many people do this, checking exchanges on monthly basis to know their performance and know how to go about them. This is a source from Coinglass that shows the top cex that has done well this month.
some users may not have many accounts on exchanges. only have one or two accounts on the CEX exchange for trading purposes that they already trust and think they are comfortable with.
I don't think many people will check the performance of the exchange. maybe check when they have new tokens in their wallets that are planning to be listed on CEX.
it may be different for those who trade with an Arbitrage strategy. they definitely monitor how developments and changes occur in each exchange to look for opportunities.
There are a few exchanges I use and it doesn't matter and I don't check how they are performing on monthly basis. Binance surely is the leader and is one of my most used exchange. It satisfied most of my needs on cheap transaction fees and withdrawal fees.
There are a few more exchanges I use for some special coins or for some special needs like higher interest rate on staking or options for bot trading.
The exchange coin doesn't always signifies the success of the exchange as they are differently utilized on each exchange. Even though they perform well on bull market they are not among the best performing genre of coins recently. Meme coins and Smart chain tokens outperform them everytime.