Well, you know what's _really_ great about the Hennessy? It's an all-in-one system: hammock + bug net + tarp. For me, and I'm sure a lot of others, that makes it an easy solution. I don't think I could have started with hammocks had it not been for the Hennessy. I had never tarp camped before and I liked the "enclosed" feeling of a tent. It took a while to get used to it.
Honestly, I wish more guys who sell camping hammocks (e.g., those with bug nets) would package them with a tarp because for mainstream consumers, it looks like a complete kit, and it is when you compare it to a tent. Why sell a bug net hammock without a matching tarp?
Hennessy was ingenious and used an asym tarp that matched the hammock shape. It is also an inexpensive solution. I think a larger asym tarp or diamond tarp should be standard fair with all camping hammocks sold.
THEN, after you've had your fun with a small tarp, you can upgrade
OR, (again like Hennessy does), up sell your consumers with a larger hex tarp at the point of purchase.