Likely because preorders are good. So no reason to bundle it, for some lost profit? While the bundle in europe might be to promote the game more in lesser known countries.
Could be, considering the ps blog said that it's limited to select stores, so it's not even going to be a widely available bundle. Seems like it's going to be even less bundled than I:SS, which already wasn't bundled much. Honestly, doesn't look like the game is going to need it, will sell well enough regardless. Then later if they want to push its legs for statistic's sake they can bundle it the same way they're bundling TLOU:R, after the game breaks 2M copies.