Not really, I always swapping my vault reward usually with around 1$ us less a little bit can swap those into other currency. Well, I think they have the data for swapping currency after the vault reward is distributed. To many people doing the same things just like I did, that's could be reason they change the rules amount for exchange. So, people cannot swap small balance from vault reward into other.
I used to do the same thing in the past, converting some coins into 1 coin so I can get enough balance in single coin to play.
As you said, it is now impossible to do it because of the minimum swap unless we receive big enough amount every distribution time.
What we can do now is to collect it and keep it until we have more than $5 for every coin so we can swap it
Of course it may take so many months for us because we have small amount of locked chips in the value.