I think that definitely language has shifted a bit, and terminology that used to mean "artist that is unable or does not want to get a publishing contract" now means "small limited resource artist". I mean for gods sake there are "indie" publishing companies now. Which I regard as this amazing contradiction in terminology.
But yes, my pedantic side insists that if a large well funded game(or movie or song) uses the same legal entity to fund the game as was used to build it. They are independent and may fairly use the term "indie". Steam is a weird kink in the rules, because they are technically publishing all these games. But I hand wave that away by claiming that they are a market not a publisher(the difference being that a publisher takes on risk by paying you before the work is done).
But yes, my pedantic side insists that if a large well funded game(or movie or song) uses the same legal entity to fund the game as was used to build it. They are independent and may fairly use the term "indie". Steam is a weird kink in the rules, because they are technically publishing all these games. But I hand wave that away by claiming that they are a market not a publisher(the difference being that a publisher takes on risk by paying you before the work is done).