Best would for adding value to the currency may be a bitmit in dvc? Then people may not even convert to fiat but stay in dvc to later buy something they want.
Why don't we contact bitmit and ask them to add a devcoin payment option? At worst they'll say No - but they might say Yes.
That would raise the value. They might add it providing that they can see a profit in introducing the currency, if not they might refuse but you are right about the worst they can do is refuse. if they refuse there is still nothing lost.