Board Thread:Episode Discussions/@comment-25319479-20160901110335/@comment-25122992-20160905165740

Either way, with the current knowledge, there's no evidence TSB users can create more TSBs than they were given after their Six Paths Senjutsu activation. The argument "they had no time to create new TSBs" is just an excuse, for example, Madara could've stayed a litte longer in Kamui dimension to create at least 2 new TSBs (he still possessed one back then and the remaining five were taken by Minato) when he retrieved the left Rinnegan, but he didn't do that. Moreover, we've never seen something called "TSB creation" because all the TSBs accompanied different kinds of Six Paths Senjutsu (for example, Naruto's SPSM) and were used up until there was none of them left. Also, Kaguya's TSB is not a regular one, since it's even categorised as a separate jutsu, so a lot of the regular TSB rules don't apply to it. Even then, Kaguya managed to create only one.