Ah, sorry. Both are true.
I meant only support can give the exact answer you need to correctly plan the upload strategies. Stats of your and that mentioned author case say that batch feature is switched off now, we are just not announced of it. It seems so. Like they didn’t announce the appearance of “download preview” button on sfx 's pages last autumn - not the small detail for those who had massive portfolio uploaded while old rules! Or new AJ reviewer wasn’t introduced also, he came quietly.
I personally didn’t find that option much useful for me, preferring more first flash-exposure for every single item than fast review.
By the way in my opinion sfx bulk processing didn’t bring much order to the library, some things were missed in those batches, in terms of quality and similarity. Not your case of course, but generally. It was noticeable. (perhaps it was one of reasons to leave that method?)