I think that most who are questioning it are rightly suspicious.
This does not appear to be a simple “free upgrade” and looks much more like the classic marketing tactic of trying to induce a false “need” in your customers in order to sell more. It looks like a forced try-and-maybe-you-will-buy scenario.
It could be helpful, perhaps, to view it in your terms as a freebie but it is far more likely that this is a manipulation by Vumatel, a company that is already expensive, and I think that is what people are actually feeling uncomfortable about.