This will be a great resource for many people chasing their Palatine roots; shame about the paywall. On the other hand, the two volumes of Jones 1988 book are currently selling for almost $500 in Amazon. By that criterion, an Ancestry subscription is a great deal.
Philip L. Otterness, the author of the book "Becoming German" about the Palatine migration, used the Jones books to create a database of every Palatine in the Jones books--along with big-data maps that located point of emigration for about half of the 1710 NY group of Palatines. I wonder if Otterness would be willing to share his database with Wikitree.