What’s fraudulent about it? Here’s the definition of fraud:

A deception practiced in order to induce another to give up possession of property or surrender a right.

The legal definition is either an intentional or (usually reckless) negligent misrepresentation of fact. From what I’ve seen, every manipulative MTX game never misrepresented any facts (you will get X if you pay Y), they just create an environment where you want the thing more than you normally would (e.g. the thing won’t be available tomorrow). That’s not fraud, it’s just FOMO, the crux of advertising.