extremely low at 0.150%. Can you custody the crypto that you buy in this way on Binance?
Its 0.1% and yes you can withdraw your coins as long as you bought them on spot (not futures or margin).
You can also trade using BUSD trading pairs. That way you can reduce fees to 0 but you have to be a maker. Its not a problem to always be a maker if you know PHP and trade using API and simple algo.
I was looking into and wondering about using strike app to trades since there are no fees at all and on the lightning network. But they don't have the download CSV file option. For that matter other than looking at your brief history that they have in the app there's really nothing other than yourself keeping track of all your trades.
Fees is not everything. There are also spreads (slippage) that on low liquid trading pairs are far bigger cost than fees. That's why it is important to choose high volume exchanges. Especially if we are talkig about lowering from 0-0.075% to 0.