point of order: I've replied on the basis that any building trying this.
I am a Realtor and I would love to see rental buildings do this.
You ask why? it's a rather simple strategy from a marketing point of view and a business.
Any time you charge a fee outside of the years first, you start the thinking of " maybe the grass is greener on the other side let me look at buildings "
Everyone knows rental increase, and that's acceptable. Most people don't accept, or welcome, fee's of any sort.
A rental building that does this would be a target for my local bar advertising in the local area ( believe it or not, bar coasters work ) and I would make sure that it would be part of my presentation if I know the history of the building.
easy pickings.
Without data, we can only assume that retention rates will drop from upper 90's to lower 90's and brand value will diminish. I am also guessing ( I have no data ), that vacancy rates will increase from 2% to 6% or greater.