Yes, since people actually use that tag it makes it easy for us to find topics about mint >:-D
A Mint question could be valid if you have Ubuntu/Mint with Ubuntu/Mint in a VBox and there is a problem with the communication between the two. Or with a dual-boot setup.
As long as there is a relation with a supported Ubuntu operating system and secondly a relation with Mint it is valid. Solely Mint is not valid.