Why isn't one of those providers roflstomping the other 3 (add OCI to the mix) with better pricing?

Because they land your data in their systems by offering you a sweetheart deal in year 1-2 and then they jack the price back to the extortionate level once you're stuck. Compute is portable between providers, but data is not.

With such a small group, chances are they all figured out that a race to the bottom won’t reach the desired long term outcome.

"roflstomping"¿ What does it mean?

A beligerent that so completely outclasses their opponent that they can inflict existentially threatening losses with so little effort that its expenditure is indistinguishable from normal overhead

Alternatively, when Stitches managed to ambush your level appropriate character alone in Duskwood

It's from online gaming. To stomp means to defeat soundly/easily. To ROFL is to roll on the floor laughing.

To roflstomp is to defeat someone so easily and completely that it becomes so comical you'll be ROFL.

Downvotes? How strange.

I've often wondered about this. I'm guessing large customers can all negotiate extremely deep discounts on bandwidth from all three providers. Smaller customers may not be paying that much in bandwidth that it would be decisive. I think also that if say GCP cut its bandwidth charges by 10x they might attract customers they really don't want.

IMHO, there's a couple parts to this.

Part 1 is bandwidth prices vary tremendously by location, but clouds would like to have customers in expensive regions too, and if US overcharges at 100x, and Brazil overcharges at 25x, the customer will only have to pay 2x for bandwidth in Brazil. Not a lot of cheap hosting in Brazil, from what I've seen, but there are a lot of users in Brazil, attracting cloud customers justifies putting more cloud hardware there which benefits the cloud.

The other part is that bandwidth is easy to measure and broadly correlates with general usage. On a shared system, you can't really meter watt hours, but you can meter bandwidth. Bandwidth charges are how the difficult accounting is reconciled so that the cloud can charge enough to hit their desired margins. If bandwidth was just a cost plus, other things would cost more; if everything had to be cost plus, accounting would be much more difficult for everyone (and it's already pretty non transparent)