Where Chess.com is hosted

Chess.com is hosted by ZeroLag Communications (zerolag.com). If you use the tracert command in Windows to trace the route to Chess.com, it first passes through a Zerolag router. And zerolag.com lists Chess.com as a client.

This however posts some more questions. Did Chess.com's premium memberships get inspired by the Silver, Gold, and Platinum hosting plans of Zerolag? How much such subscriptions are used by Chess.com? Which OS-type are they using? When will Chess.com move to their own dedicated data center? Why was Zerolag chosen? Does Chess.com instead host their own server at Zerolag? How could the premium membership rate go down if Chess.com switched to their own datacenter?