I don't know the averages, because it's not required to be disclosed. You don't have to disclose, unlike in the U.S., how much you are spending on lobbying efforts as an organization, or how much you're paying consultant lobbyists. It should be part of what's disclosed. It's one of the loopholes in the Lobbying Act.
As for the penalties, you could go to jail, but as I said, the RCMP has let nine out of 10 lobbyists off the hook, so what's the incentive to comply? If you don't have an incentive to comply, you won't see compliance.