This becomes virtually true regionally I think. I believe you that there are 100s of MVNOs, but I only saw Boost and Mint within my area physically. Now one is gone.

I’m still in an area where I have two options for Internet, one of which is on top of the other’s infrastructure. There are hundreds of ISPs nationwide, I’m sure, but not in my area.

Buying out under-cutters and re-listing the service at the price you prefer is a crude and simple strategy and can only really be done by the largest players.