Hi we are intending to upgrade to a lifetime licence, but just want to check if we will need Enterprise or Platinum.. if I create a new app for customers to use, we would like to let customers have their own private access on a subdomain, ie customer1.website.com, customer2.website.com - if we have for example 20 customers utilising this, would it need to be Platinum as more than 10 or would it be counted as one application installed 20 times? Thanks in advance!