Ganymede and Xanadu are owned by Priceless Attributes but are not factory towns in the sense that Petersberg is a factory town. Only a relatively small proportion of residents are directly employed by Priceless Attributes. The cities are essentially a business venture. Priceless Attributes rent retail space and housing and supply public utilities; power, water, education, health, security (Wolfram is a subsidiary of Priceless Attributes) and so on either directly or through sub-contractors.
Under this system not only do Priceless Attributes amass obscene amounts of wealth they also control their population to a degree only dreamed about by any dictator, oligarchy or parliamentary democracy. The resident of Ganymede or Xanadu is educated by Priceless Attributes. He lives in an environment designed by Priceless Attributes. His news comes from Priceless Attributes. His entertainment is provided by Priceless Attributes. He is subject to laws drawn up by Priceless Attributes. Strictly speaking there is no public space in the cities of Priceless Attributes. Everything is owned by Priceless Attributes. There is no need for censorship as such. Distribution networks, media, publishers, advertisers are all either owned by or in thrall to Priceless Attributes and any material critical of or detrimental to the interests of Priceless Attributes is strangled at birth.