Gee this is old.  No it's not okay - I never said it was - I said that individuals shouldn't be basing their own morals off of what a big company like Facebook does.  Their morals should not be the source of other people's morals.  What they are doing with selling information etc is not okay, but that doesn't mean anyone should use their behaviour to justify doing something similar to what they are doing, nor should people use other people's behaviour to justify their own.  That's a slope.  Definitely don't use Facebook as the determiner of how we should behave.   

As for the other comment, there's a huge difference between sharing someone's work with no changes made and profiting off of it and adapting someone's work or including it in a bigger project or using it as a inspiration and to then translate that to basic principles of science etc as though building on scientific knowledge is the same as profiting off of someone's work directly without making any changes is ridiculous.  Do whatever you want morally in regards to this, but there is no comparison between profiting off of someone's work directly as is with no changes and something like a lets play or reaction video let alone profiting off of something like scientific knowledge or maths.  There is no meaningful comparison between those things as doing one is very distinctly different to doing the other.