A miner fee still violates the GPL.
If You try to elaborate this, I believe community will witness first case of "bensam1231 admits it was wrong about".
One sentence please.
If you're going to talk about GPL, go to their easy to use website and just site me the topic matter. They literally cover everything. If he charges a 'subscription', he still has to give the source to everyone that uses it. Just the same as with a one time fee.