Do Airofit/similar devices help develop good jaw?

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Saw this device on instagram. It was designed for improving breathing but allegedly trains masseters, pterygoid and platysma muscles symmetrically? Anyone tried it?

 

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Example here:

 

[veggiedietcell]

Example here:

Nope never do it, trains ur buccinator atrophy muscle(aka cheek muscles) which will make u looks bloated

 

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Nope never do it, trains ur buccinator atrophy muscle(aka cheek muscles) which will make u looks bloated

Any validity to these claims?

 

[veggiedietcell]

Any validity to these claims?

View attachment 3358262

Could be valid, but is it worth taking the risk?