I'm not sure if this helps but if you're considering a subscription system I put this spreadsheet together in Google Docs so you can see how many subscribers at

I'm not sure if this helps but if you're considering a subscription system I put this spreadsheet together in Google Docs so you can see how many subscribers at each tier you need and what your costs will be: http://spreadsheets.google.com/ccc?key=0AumfOxrn5FGtdEN5U21LTks4QzFnTHBNZDhCaThZSHc&hl=en http://spreadsheets.google.com/ccc?key=0AumfOxrn5FGtdEN5U21L...