Not all customers are or will be highly engaged with your company. When you find ones who are, make sure they know that you find them special. Reward them special offers, including exclusive access to in-depth product development forums like Jawbone Insiders.
Jawbone Insiders incentivizes nearly every survey and poll with drawings and prizes. The possibility of winning a free product drives customer participation—and it’s an inexpensive proposition for most businesses.
To maintain long-term engagement, make sure your customers know how their feedback is impacting your product development. When you release new products, tell customers which features you owe to their feedback. And don't forget to say "Thank You"!