Your visitor landed on this page for a reason. Whatever you’re offering, they’re at least a little bit interested.
Instead of writing an essay about your product/service/offer, just give them some teaser copy. This way, you maintain a sense of mystery, which prompts them to learn more. In order to do that, they’ll have to give you some info first.
Remember, a little ambiguity never hurt anyone.
EARLY SIGNUP BONUS
The last thing you want a visitor to do is think, "I'll do this later." They won't. Give them a sense of urgency!