Revenue share and price parity are standard clauses in most department store lease contracts and not at all unprecedented, at least in my experience. My company is routinely told that if we want the lease, we must pay a fixed percentage on sales (usually 25%) as rent, must not list a price higher than can be found elsewhere for an identical item, and all payments must be handled by the department store themselves.
I assume there's a minimum required so the landlord has all upside and no risk. That sounds like a super bad deal. The only way I can see that being practical is if you're getting space in a super exclusive location where the clientele are mega rich and the margins are insane.
