Do you use Xojo Cloud?
Well, it's a convenient way to host Xojo apps:
For a space for yourself to test web apps
To host web apps you want to present to a client
To get a server for client to host their app you wrote.
While you can setup yourself a virtual private server with some configuration work, for a lot of Xojo developers it's certainly more convenient to buy the xojo cloud server and deploy there. Let someone else install Linux updates and keep an eye on intruders and security.