The bank, card network, and processor all make fees off every transaction. I charge ~$70,000 per year on my card while paying in full every month. I get ~$1,200 back as a reward. The various institutions split an average of 2.5% per swipe…or ~$1,750 (though probably higher).

No such thing as a free lunch, my friend. As you pay more on everything at retail as prices rise to cover.

I have an amp plugged into a 3.5 mm jack on my AirPort Express and I use it daily. I will be very sad when Apple drops its functionality.