No systems I've seen use that specific data point. Sadly for communities (and probably good for prospective renters), the third party sites you might find listings on (Craigslist, Apartments.com, ForRent.com, etc.) don't share that data that I've ever seen.

However, demand, which is usually a variable in the pricing equations, will definitely be generated by the lead tracking the community does, which can include: # of incoming phone calls, # of walk-ins, # of incoming emails.

tl;dr: Clicking on the ads won't do anything. Taking action and reaching out to the community can do something. And a lead is usually tracked on a unique user basis--so one person calling 50 times vs. 50 people calling once is vastly different.