Beyond the other answers stating that this isn’t real:

Teams doesn’t do one off charges for functionality like this. All functionality is managed by licensing, managed through your workplace’s Azure tenant. Don’t have the license, don’t have the feature. Need the feature? Time to work with Microsoft billing to get you a new license (or additional one) and then your IT team to have the license applied to your account.

There aren’t usually any upsells displayed to end users. In our environment we’ve only seen a rare “this functionality is not available on your license, go complain to your admin” type message, but usually it just doesn’t display unavailable options.

On top of all that, Microsoft is dumb, but not this dumb. Last thing their team of lawyers would want is for them to be involved in some sort of “involuntary pornography” case or something.