Dunno what's the catch, but another oddity, stupidity or you name it.

If you buy just ME3 on EA site, you'll pay 25€.
http://store.origin.com/store/eaemea…s-effect-3-IE/

However, if you pay the same sum, you get all three MEs in this bundle, including Pinnacle station and Bring down the sky DLC:
http://store.origin.com/store/eaemea…ctID.257846700

Either I'm not seeing this right or perhaps my web browser has a bug.
The oddity doesn't end up here - there is no free promo (OP) item included.