It makes total sense im afraid, his shares increase in value every year the SKY deal is active, to use different examples.
Bill bought most of the club for 20m 16? years ago, I think he paid around 8m for his %, hes looking at a return of around 40m, give or take a few pennys, thats with ZERO investment.
Mosh and Ali paid around 80m for 15% of Arsenal, Mosh recently sold 15% for 200m, again, with ZERO investment.
Lets assume Moshiri gains 100% control, for around circa 200m, he can then build a new stadium, with loans and probably sell us in 5 years for triple that, he wouldnt need to invest a penny.
Whos to say he doesnt still own that 15% in Arsenal? He hasnt traded anything, hes added to his portfolio.
To say he must "invest" to make money is wrong sadly, I point you towards Manchester United, how much money did the Glaziers invest in United? and what is their likely return? The Yanks over the park?