Sometimes you just need to say a lot. When you have a large block of content to add layouts like this are helpful. The copy doesn't feel cramped when you lay out a page with proper padding and spacing. It helps readers scan copy if they'd like, or just cut through the crap and convert.
If you're really feeling long-winded you can load even more copy. Be sure to break it up a bit. No one wants to read 3,000 words of block content. You'd be better served to layer in some bullet points or even a video if you're feeling frisky. If you do write this much copy on a conversion page you'd be wise to be on point with the value prop. Use this space to really drive home the value of the offer so the visitor is compelled to act.