My point, which you have failed to grasp, is that they can't explain their policy, because their policy, by its very design, is to force users to a tiered plan. It's not "throttling heavy users." ...
Well, their call volume goes up whenever I call, which makes their employees work harder, which either a) prompts them to bring on more call center reps, costing them more money or b) prompts employees to quit, degrading the level of person willing to work for them. I also mentioned that I'll be leaving them as soon as I can not be paying them for an early termination fee, and canceling other services with them as well. I'll also be telling friends and family of my experience, and advising them of how AT&T does business, hopefully costing them future customers. I guess it's funny that they get a couple hundred dollars from me for 6 months, and then lose far, far more down the road. Yep, a laugh riot.
I hope you work for AT&T. If not, you're simply a corporate apologist or "fan" of a company that has no such allegiance to you. Anyway, feel free to ignore any of my future "complaints," as I will be doing the same to any of your responses.