Well selling that data is completely against their business model!
For example Google's entire revenue model is based on the idea you give them money and ads to show and they choose where best to show that. If they sold the raw data it would undermine that.
Basically no amount of money would be enough for Google to give away their entire business.
I'm sure they would be happy to sell data provided the person purchasing the data would not be in the ad space.
For example, if the government says, "here's $10B dollars / year" give us that data and we wont use it in ads. Google doesn't have a business incentive not to provide it the data.
Neither Google nor Apple sell your location data. Other ad providers will.
This matters a lot but is ignored by comments like this.