The point about the investment is both parties (Blockstream & investors) have made it quite clear that the reason for the existence of Blockstream first and foremost is to promote & improve the Bitcoin ecosystem as a public good.
Oh come on man. Even you're smart enough to know we, as a community, should not buy into that sort of promise. History is littered with failed projects that were based on such naivete.
That's the problem. Whatever they will say you will attach ill intentions to them.
Excercising common sense & being cautious is one thing. Clouding your judgement with personal grudges and ill-informed opinions is another.
The model they are working from (Mozilla Foundation) is an excellent example of such projects that has succeeded. Given the backing they've received, the mindshare & the resources available to them my bet is the Blockstream venture will be a success as well.