hussam wroteThe incentive should be the competition. There is an abundance of bandwidth in some places as well. A friend of mine in the US has 60MBit unlimited and if they suddenly don't like the company, they can simply switch to another one.
The report says "six unnamed companies" which hints to oligopoly.
If they all agree to choke the bandwidth, they will be effectively creating artificial scarcity, thus keeping prices high for the same bandwidth, sort of like what is happening in Lebanon.
It's not the smartest thing to do, and it's illegal in the States, so I doubt that's what's happening, although it's not outside the realm of what is possible. It's just a stupid thing to do, all things considered.