Xavi said it all. There is not much I could add.
In this context, Tiki Services is about buiding customised Tiki-based solutions, including bug-fixing and extensions-coding.
alsawiki.com can host Tiki websites for its clients but its business model is not about providing a cheap automated Tikifarm platform.
Sadly, I have no knowledge of anyone currently providing a wikifarm service. I looked around. It would certainly be a useful service.