I don't see it as exploitation. You have your house on someone else's land. What did you think could happen?
If I park my car overnight in a neighborhood known for crime, I don't expect nothing will happen.
Most people who own land want to make a profit from that land, or at least break even...I'm sure there are property taxes, insurance, who knows what else, costs to the landowner.
One of the things stopping me from getting the sailboat I want (a sailing catamaran) is the marina cost for a slip which can cost well over $1K per month for even a small catamaran because of its' beam (width), even with a 12-month lease to offset costs, even if my boat isn't there; shorter terms are even more expensive. I expect that cost to continue to rise. A mooring is less expensive, but tough to find, none are available close by...
we all need to be informed consumers, and understand the total cost of ownership, and understand what can happen.