This is more or less normal in long-term business leases: everyone can do the same math, and it's just a way of making the immediate pain of a new lease a littl

This is more or less normal in long-term business leases: everyone can do the same math, and it's just a way of making the immediate pain of a new lease a little less injurious to the tenant's cash flow. If the tenant shrinks headcount, they can sublet a portion or move to a smaller space and sublet the whole thing. If the tenant is growing their business faster than the rent increases, it doesn't hurt. And at the end of the lease, everything is re-negotiable again.