The inclusion of so much sponsored content is moving me away from Pinterest. I'm on there searching for things I can make for the house or for the yard (I like to turn trees into furniture or art) and getting the most irrelevant sponsored items now. It has driven me away from using the platform.
And that is the point [USER=10940]@Mark Daniels[/USER] is making on #4. You need to craft the offer in-line with the space you're advertising on. Dealers, this means you can't just pepper every spot of the Internet with payments, rebates, and prices.
If you're going to advertise on Pinterest you will win more customers by focusing on things that show people in the cars or DIY topics. If you do tackle Pinterest successfully the added benefit is more Instagram content.