Just recently a Trulia was extolling the virtues of 'HITS' as a meaningful measure of success! There is a whole lot of nonsense out there in the internet marketing business.
What is important in any attempt at lead generation is understanding where the responsibility of the aggregate source end and the agents begins. An agent is capable of rendering ANY and ALL lead sources ineffective based on their IDWDT mentality.
I've been served the very best wine and when I see lip stick on the rim that is not mine...the wine no longer matters. All the work and effort of making the wine, bottling the wine, delivering the wine, setting up the restaurant, buying the crystal, hiring the entertainment, placing pretty people on staff, falls flat at the very last minute. The real estate agent can be the smudge that will sabotage any hope of success. Maybe judging success only by the dollars generated is overlooking a truly important aspect of ones business.
If you know how to write good ad copy, then counting click throughs is key. After the click,,the reality is, "It's all up to you," not the aggregate lead generator. The clicks however, is the sole responsibility of the company promising the moon.
You do realize that you stated you don't pay attention to views and yet your focus is on ROI from exposure? That sounds credible and makes perfect business sense.