V-bucks should be banned completely, along with all other illegal gambling.
It's similar to how slot machines require tokens, but I don't think that's quite gambling. The gambling part comes in with loot boxes, where you're essentially paying to roll the dice to get something of value.
Some casinos still have an aisle or two of coin machines for nostalgia though. People collect these tokens, but I'm sure that hobby is on the way out since new mint is pretty rare.
A microtransaction isn't gambling by default.