1. You won't increase rents for existing leases, these need to be up for renewal so you can make changes to them.
2. You are assuming that you control the whole market. Even if 70% of landlords use RealPage and their pricing recommendations, the remaining 30% should be able to absorb some of the people moving out as a result of this if the new rent is substantially over market.
3. This creates somewhat of a prisoner's dilemma problem. Any non-compliant landlords inside the 70% bucket could only raise their rent by 5% instead of 10%, get full occupancy rates and come out ahead of their competitors.