Honestly, I can never be bothered to visit these RPG supermarket sites mainly because I don't play D&D or whatever but also because it invariably means me allowing scripts etc. on the resulting webpage to see stuff. So whenever you post about these map packs all I ever see is your little thumbnails that you post.
That being said your thumbnails always look nice and I do not doubt they are nice maps.
I always have to wonder though, is there much of a market for these things? Do you make money from them? I guess you must as you seem to be rattling them out. Anyway, good luck with your new pack.