Just do a premine in that case - Why pretend you're not premined (as they advertised), yet realistically your distribution has the exact same concerns as a premine? The only reason I can think of is that there is a negative connotation with premines, so might as well do a stealth mine which has the exact same effect (skewed distribution towards founders), but less PR concerns. The technical semantics they went for were just a lame tactic overall and even though they were transparent about how much they had, it was still handled poorly (in my opinion).