Meh, it's just EA doing what they do best, selling stuff to people they know will buy their stuff. This specific case ain't worse than... say... having an alternative appearance pack in single-player for ME3 that costs $2, or having two weapons packs (for single-player) which include already-available weapons (in multi-player) which also costs $2 each. It's not really micro-transactions per se (I mean the ME3 example I gave), but I'm just saying that having "content" (or currency in some cases, to ultimately get new content) for single-player that you bought with real money isn't new to Dead Space 3 so shouldn't be a big deal. I'm getting to a point where I just shrug when I hear about DLCs in general, be it DLCs that most of which (if not all of which) was already "on the disc" but you had to buy to "unlock"... or DLCs labeled as micro-transactions for single-player (or vice-versa) or the other way around. I mean yeah... it's 2013, and DLCs is the a business model that isn't new either and is just getting more common as the years pass. Even Indie games follow the trend (not much choice to do so as an Indie dev I get that, especially when the already big ones do it).
Just taking one Indie game example, namely Gratuitous Space Battle (which I own, excluding all but a single DLC) which I love by the way, nonetheless has seven DLCs for it. The base game costs $15, but each one of the DLCs cost $6, if you were to buy all of them (obviously to get the "full game", rather than the "basic game") at their current price you'd end up paying $57 which is pretty much the price of a "normal" brand new PC or console game. Heck brand new console games can cost up to $69.99 (and even more than that sometimes) such as - but not limited to - "collector's editions", and so on. And even those bundles don't always include all "upcoming" nor all "already released" DLCs and you can end up paying even more than the already higher price of said collector's edition of this and that game due to upcoming DLCs that even the collector's edition will "benefit" from. The point of all this, I guess, is that "a game" today isn't always "complete" by any means upon release as it used to be many years ago (I.E. pretty much prior to this current generation, referring to XBOX360/PS3). It did not "start" with this generation, but it definitely grew and sometimes did so almost out of proportion or control, and occasionally gets quite ridiculous especially in terms of pricing and/or content (and sometimes in the "way" it is being delivered, such as you buying extra to "unlock" content that is already on the disc that you bought full price in the first place).
Anyway, I just want to finally add this. That, today (nowadays) more than ever before (couple of years) a "single-player" game doesn't mean that it *has to* be excluded from micro-transactions nor does it have to be excluded from later-released content. It's not like it used to be, as many of you guys will surely remember... when we used to go out at the store and buy ourselves that brand new SNES, Genesis, PS1 or N64 game. When we bought those games, we bought them "completed", we had "that" and that's it. If we wanted "more of that" we had to wait for a sequel, and if you were gaming on PC during the same years you wouldn't get a DLC, you'd also wait for a sequel or if lucky enough an expansion pack. Today, we buy a game but we don't necessarily buy a "completed" game. We buy a "product in development". Heck, we can even sigh-up for beta games (either closed or open beta of either F2P or subscription-based ones) in which the micro-transaction store is already in place and is in fact presented as probably the most developed part of the game for obvious reasons... to fund the game's development and let it reach another milestone. I'm playing a bit of FireFall lately and that game is undergoing this exact business model (get invited for beta participation, and you can already buy stuff at their micro-transaction store while it's still being developed).
So anyway, yeah, Dead Space 3 gets micro-transactions in single-player... ok... let me shrug it and let me expect Dead Space 4 to have the exact same, exactly because EA knows that, ultimately, it works (even if for some it doesn't "make sense" or isn't "desirable").