Your rebuttal is literally "nuh uh." You asked for a source, you were given a source: documentation that shows RealPage discouraged landlords from negotiating, and landlords admitting to not negotiating. COULD they have negotiated? Sure, and a unicorn COULD be orbiting Saturn with 5,000 homes in tow, trying to figure out the optimal thrust vector to come to Earth. Anything COULD happen, but we know what DID happen: RealPage and services like it have enabled landlords to collude with dubious legality on rent prices, and rent prices went up as a result. The most predictable outcome.