[theshrike79]

So if an Australian ad tells something is "the best" or something similar and you can prove it isn't, you can get your money back?

[packetlost]

Usually subjective opinion isn't binding (though I'm sure there are exceptions to this across jurisdictions)

[Zagorath]

The link I shared makes it quite clear that "puffery" that nobody is reasonably expected to take literally does not count.

Being told that the app you paid for would be a one-time payment, and then having the service deliberately degraded to try and force you into a subscription model, is clearly not puffery.