I am rather certain that guys consumed less-legal substances while drafting their whitepapers. That is my top reason not to consider their business "legitimate".
ok, to those who didn't get my point.
Everyone is certainly entitled to make up their own definition of "legitimate". However, as long as we are all speaking English, we can agree on what legitimate means. And it means the following:
le·git·i·mate
adjective
adjective: legitimate
ləˈjidəmət/
1.
conforming to the law or to rules.
"his claims to legitimate authority"
so, it's great to have a learned opinion on filecoin's tech, but its irrelevant to the discussion of whether filecoin is a legitimate business