I'd be surprised if AWS/Google/Azure accounted for more than low digit % of all "hosting".
Last hard numbers I saw, Amazon was the single largest by # of servers, but OVH wasn't too far behind. There's thousands of these worldwide, most older than any cloud provider. Some of the more well known: OVH, Rackspace, Softlayer, Hetzner, Hivelocity, Online.net and on and on.
Add to that people doing their own infrastructure (Apple, Facebook, Google, ...). Companies doing huge colo and on premise (banks, governments). Then consider even larger providers and telcos: AT&T (where WoW was hosted, might still be), Telefonica, Equinix (which I believe AWS was merely a customer of in Singapore at some point), ...
That still leaves VPS, shared hosting, and whatever you want to call DO/Linode/Packet/Vultr.
Last hard numbers I saw, Amazon was the single largest by # of servers, but OVH wasn't too far behind. There's thousands of these worldwide, most older than any cloud provider. Some of the more well known: OVH, Rackspace, Softlayer, Hetzner, Hivelocity, Online.net and on and on.
Add to that people doing their own infrastructure (Apple, Facebook, Google, ...). Companies doing huge colo and on premise (banks, governments). Then consider even larger providers and telcos: AT&T (where WoW was hosted, might still be), Telefonica, Equinix (which I believe AWS was merely a customer of in Singapore at some point), ...
That still leaves VPS, shared hosting, and whatever you want to call DO/Linode/Packet/Vultr.