Believe it or not a big part of cloud migration is figuring out how to cost it and get the finance people on board with after-the-fact operational expenses (*aaS) replacing capital/labor expenses (servers, sysadmins, network engineers, etc). When I worked in defense contracting I sat through half a dozen meetings with cloud vendors and virtually all of them took the time to explain how the costing model was distinct from on-prem, how to estimate and budget, governance, etc. At the end of the day many orgs with deep pockets also have very entrenched financial processes. AWS is doing everything that it can to make a play for these dollars by creating on-ramps such as this one.