You have things mixed up. The Malls customers are the tenants. The "customers coming in" are customers of the tenants, not the Mall.
To fix your idea...
You and me are the customers coming in.
The telecoms are the tenants.
And the Mall is a backbone provider.
Apple is a tenant in another Mall also connected to a backbone.
Why would you expect Apple to pay you so you can fix up your store, it's not their problem if you want to sell at a loss.
The telecoms are like UPS or the post office. They get paid for shipping packets.
If I mail order something there are two choices.
- I can pay shipping in advance and shop pays the shipper on my behalf and I pay nothing to the post office when it's delivered. Telecoms don't do this*, I pay for every packet.
- I can have it sent with shipping COD. I pay the shipper when it arrives, but I pay by weight/size not the value of the contents, or how much profit the seller is making. A kg of gold costs the same as a kg of organic fertilizer.
If I use 1 GB of data, I should pay for 1 GB of data. If I'm pulling data from my home computer, a work email server, or youtube there is no difference.
* Other then a few walled garden services offered by the telecom where you pay a monthly fee for the service and data is included.