BTC.com's accelerator is so overpriced. I
took this transaction, which is 361 bytes and pays a 75 satoshi/kb fee, and BTC.com asks for $4.42 just to accelerate it, which I find it hard to believe that anyone would be willing. If you are willing to pay $5 to accelerate a transaction, why not just spend a bit more on fees so you don't need to pay the $5? I wonder what BTC.com was thinking with this.

For me also it is crazy idea, but the truth is that ViaBTC is overloaded and people are looking for other possibilities.
But using VISA to pay for Bitcoin transactions looks for me like nightmare or joke of village drunkard

If you accelerate a transaction within the first 10 minutes of every hour, it's a very good chance that you can get it.