I think you're right, the scale and N arrow could be de saturated a bit. I prefer having them in the "Legend" box, I don't want to spread those elements around the map unless it's a larger reference map. Arguably there is no need for a N arrow (and truth be told true N is slightly rotated off top of page anyway, but not enough to matter, in this case it's mostly an embelishment that I decided to keep in the map).
No waypoints embedded in the map but I could create an accompanying KML of lighthouse locations and provide it from the map website. KMLs can be loaded directly into the map in PDF Maps. But potential map users might take that over the PDF map so not sure if its worth including. Of course its relatively easy to make your own by grabbing the coordinates online.
Good observation on the scale and range indicators, definitely seems off. They are both from the same Map View so should be in agreement. I'll double check the values for the ranges and the scale. It could be a projection issue. I'm not sure how MAPublisher handles buffer generation.
I love PDF Maps, but I'm not really making any money off it (yet). I get a kick out of seeing the maps purchased, it's gratifying if nothing else. But to actually make money you probably need a large library of titles within a specific set of characteristics and an upper limit to time invested in map creation. I'll probably never get back the time I put into the Kokee map but I did that because I love Kokee and my island and wanted to make the map, putting it out there for others to purchase and use is just an extra.
In order to get any purchases at all you really need to build a page for each map you sell so there is something for web searchers to land on and search engines to index. It also helps to spread the word at sites like Yelp and Wikipedia and contact any organizations that are connected to your map.
What I'm trying now is to make maps that are less time consuming to create but tap into a large group of users. Tourist and recreation guide maps seem to be a good target. The map itself is fairly simple but gives the map users enough to base an itinerary off of for a coastal tour. The key is added information like the side bar of basic info and contact numbers for the lighthouses. It's info that is readily available online but pulling it together in one place makes it that much more convenient. I think the guide info on my Kokee map is the real added value there as well and is likely why most people pick it up. It wpuld be great if PDF Maps had the ability to embed links in the map files so users could link directly from the guide to pages about the map features themselves, or back to a supplementary page created by the map author -Ted, you reading this? ; )