This is how I look at it. Morality has nothing to do with it. It's business and it's about generating as much profit as possible. The fees are high, but people still use them. A lot. From their point of view, there is no reason to make any changes. If they noticed that they lost 30% of their customers to too high fees, believe me they would change. They would even introduce airdrops, moneyback offers, and other promotions to get back what they lost.

Binance thinks only in USD terms. That announcement dates back to 20 July 2017. A source I found says Bitcoin was at $2.282 on that day. If math didn't fail me, those 0.002 BTC are equivalent to $4.50. Those 0.0005 BTC are today worth almost $22. So, they are pocketing much more now than what they did in the past.