We've tracked and measured these issues for more than a decade. In short:
1. A DR CTA that vomits payments on the customer before they've entered any data reduce conversions. ("Oh, $950 a month? I can't afford that.")
2. DR tools that take the customer away from the dealer website and make it hard to return reduce overall conversions (even when you add the DR conversions back into the total).
3. "Accurate" DR tools that build the entire deal for someone who lives in the market reduce closing percentages. Why? Because the customer already has all the information and either decides that now is not the time to buy or to shop your numbers with your competitors. (One recent example I can point to is a small Midwest group who closes their DR leads at 7-8%, yet closes their dealer website "Check Availability" leads at 23%+ - and all other metrics with the Check Availability leads are higher: Connection Rate, Set Rate, Show Rate, Appointment Close Rate. And no, adding a DR tool did not increase their total leads from website visitors. In fact, these were flat-to-down as a percentage of engaged users once the DR tool was added.)