I don't know any details of the revenue split, but I'm talking about the act of running a VPN service itself as being low overhead compared to the costs. Paying mullvad obviously reduces the margins, but it doesn't have the kinds of organizational overhead that would come with say, running an advertising company on the side like Mozilla now does.

Previously the argument was that the VPN was an example of "throwing money into open firepits", but now we're talking about the extent to which it generates revenue.