We already know that FD have invested their own resources into ED. So why do you claim they haven't?
I think there's misunderstanding. KING5TON just says that FD has their own money to invest in expansions, which is true. They have invested in ED first version, which is also true, and that number could be even bigger than 3M judging by FD replies, we don't know. KING5TON was just ironic in reply regarding post about people expecting KS money covering full development of expansions.
In nutshell:
* FD have sold expansion pass, so they will have to produce expansions;
* FD have 3M in crowdfunding and unknown amount in their own money for first game, and quite possibly some of that money will go to first expansions. We know avatar design was already done outside original dev plan;
* If ED will be successful (fingers crossed), FD will be able to acquire even more financing to produce more expansions;
I consider income minus expenditure to be profits.
Perhaps all the ED developers are voluntary workers?
True, but 3M is more than twice FD expected to get during KS. It's not maybe exactly a profit, but money to cover their expenses nevertheless. Expenditure - crowdfunding money = less sales needed for FD to break even.