It seems that Binbougami ga! (Series on Jump SQ) will have a special chapter (Color Page and 26 pg.) on Jump #30 to promote the anime that is about to begin.
It is indeed. I was actually worried since this chapter ranking is one of the only chapters in Nisekoi to have ecchi, but it seems to have had the opposite effect.
besides that it's more or less the usual, don't really care about Reborn or Bleach ranks as I doubt they will be canceled anyway. 
The lack of Shinigami was apparently the reason for Bleach's decrease in rankings/sales (according to fans), so it's interesting how it's still doing badly. I think it's finally safe to say that people are just tired of Bleach. It's not unreasonable for someone to be tired of a series after 50 volumes. 55 volumes is quite a bit, and Bleach has a really good chance of hitting the 75 mark before it ends. For some people that's simply too much.
Actually it's more the Bleach fans/haters that are sick of the Shinigami that say the lack of them was the reason for Bleach's drop. People are just tired of it's problems in general, and after the last big arc ended at a good stopping point, and the next arc was lackluster, called it quits.
Last time it seems to have resulted in them deciding to cut the arc short. Seeing as they've already announced the current arc as the final one, I doubt they'll do much.
Nop i think the toc 29 is about chapters 7-8 weeks ago ( i not sure about this), so thechapter of toriko is the 183-184.
in short toc rankings are based on 7-8 chapter ago but i suggest you should read the first post of this thread it's a good guide for toc rookies
most likely they do what they always do give Bleach CP almost every 2-3 weeks^^
Well, the editors didn't do anything about Nurarihyon no Mago and To Love-ru (when the last was in the magazine) and their constants low positions, so I don't think they will do anything with Bleach.
Don't know about To Love-ru, but I don't remember Mago ever being as high as Bleach for constant periods of time. Mago and To Love-ru(the latter even being moved to SQ) seem to have their constant hardcore fanbase and kept their position down there, but with Bleach we see a decline, quite a drastic one to boot, meaning more and more people abondon it and things might get even worse. Not to say that it will get cancelled or anything, but it will probably lose some of its merchandising or something else. At the very least the editorial department should some kind of reaction. Maybe in form of several color pages like in the past, but I don't think that'll help much.
Kubo could kill off fan-favorite characters to get back at fans and metaphorically send the message to "vote for Bleach or your favorite character dies." I doubt he'll really do that, but it would be so hilarious (and effective) if he did.
oh of course, they will smile happily and do nothing because Jump only asks them to get and deliver the chapter
The same has happened to Mago, it was quite high over a long time until it reached the climax of the Kyoto Arc. Since then it has never recovered. The Bleach fanbase can't be compared to Mago though so I'm pretty sure it will go up and down. I can't imagine Kubo doing anything drastic but like I said above, I'm sure he and the editor do talk about what can be done to improve the ranking. You mentioned it, every fan he is loosing means less money so there sure is motivation for both sides.