Note that there is a separate page [1] about tax benefits on the company website:
"When finances are structured accordingly, people who plan to run a business, foundation or other entity from the ship, can be considered to be on a continuous business trip. In this case, it may be possible to write off most annual fees."
"The ship is flagged in the Bahamas and the related fund is based in Liechtenstein. These could be considered the domicile for a business, foundation or other entity based on board (or another jurisdiction). While some ‘offshore’ models are illegitimate, in this instance, the asset is an investment in a fund attached to the rights to use a home office based offshore; so this is a perfectly legitimate use of offshore structures in tax-advantaged jurisdictions."