Shell companies are not normally used for structuring. That's a different matter entirely. A shell company is usually a holding company, not a company created in order to deceive or to bypass a hard cap on some scarce resource.
This is possible only because, while ICANN charges each registry when they acquire a domain, ICANN refunds that if they give the domain back within some time period.
[1] https://www.icann.org/registrar-reports/accreditation-qualif...
They knew exactly what they were doing.
I didn't know there was a formal term for this. Splitting up money transfers to avoid detection of large sums moving around.