A bigger plane falls victim to the square cube law - as it gets bigger the support structures need to get bigger too. At least that’s my hypothesis, clearly the article didn’t mention this. I’m curious if multiple smaller planes allows each plane to be lighter weight relative to the cargo capacity, with the front plane just sporting an engine overspend to its own size/weight.
ICANN doesn’t have the authority to levy a tax. I’m not sure how you would enforce a system like that.