Well, there are SORT of free items if you think about the notion that Grog's "currency" is given "free".... kind of.
The action of posting rather "pays for" the donuts so I guess there's a cost and they aren't free... but they aren't premium currency either, so....
How *do* you define "free", anyhow? Not costing anything just defers the question to what do you consider a cost.... food "cost" items are also kind of technically free because you don't pay IRL currency for them.... but you do have to "earn" both

and the donuts (we need a Smilie for the frosted donuts!) so are they truly free?
But then if you start down that rabbit hole, nothing is truly free because you have to also count opportunity cost, and unless you've mastered both immortality and time travel I don't think you can ever have anything be without opportunity cost, since you could always be doing something else instead.
I'm tired, my brain does this when it's tired. You should feel free to ignore it.