THEY'RE THE ONES WHO MAKE THE DECISIONS ON WHO'S FEED TO SUPPLY. IF THE FEED ISN'T DEPENDABLE THEY NEED TO SHOP AROUND. IT'S A PART OF RUNNING A PROPER BROKERAGE.
Well, in addition to CGQ, AMP futures also offer Rithmic and TT for extra fee. So if you want better data, you can do just that. Moreover, AMP ain't the only FCM in town. There are many similar outfits like Ninja, Ironbeam, etc.
You should realize certain feeds have certain markets and work with certain platforms. I can always go to a different broker or even trade a different asset even at that matter. Or not even trade at all and go fishing every day.