I think it's reasonable to say that if you're marketing a car as able to drive on road type A, B, C, D, E and F and also advertise it as having radio if drivers pay a premium, then you can't leave out the fact that the radio won't always work if drivers drive on road type E.
I accepted that Construct was experimental technology back when HTML5 game design was new and you guys were focusing on creating impressive HTML5 technology stacks, but you're now charging just a few dollars less than companies like Adobe are, and I don't think it's reasonable for you to market Construct as being immensely easy to use for the creation of both mobile games and Multiplayer games, only to have Multiplayer be restricted to a certain set of mobile carriers.
I've followed your work for 11 years, and this is the first time I've ever raised a concern. I think I (and others) deserve more than a dismissive comment about how it's not your fault.
Your marketing doesn't match reality. You need to address this, and I say this with good intentions.