I wouldnt say these are altchans due to them being centred around an unoriginal idea
Well if an imageboard is to house a community, and the jarty is a community of sootists who felt like kuz was a bad admin, and the shemmy was the same but replace sootists with dollists and replace kuz with froot, then I think that would count.
8chan, from what I remember, was a splinter for gamer gate because of the disapproval for how moderation handled the situation, which makes it a splinter.
This also implies that only one imageboard (or website) can exist for one topic. 4cuck is technically a splinter of 2chan, but that's not a derogatory statement in any way because they have different user bases and cater to different people.
We don't have a lot of knowledge about how much of these splinters are affected by 'cordtroons behind the scenes.
No, we don't, but I am going off the knowledge of what's proven right now. I see no evidence that soyjak.in was filled with actual problem people. Because of that, they shouldn't be inherently condemned and should be judged based off what's been proven.
Doll, Froot, Root Kuz (even if they do use 'cord a lot which i have my doubts) are not as bad as 'cordpedos, they don't post BMT or 'p or anything else 'cordtroons post on the sharty.
There's no evidence for any of those things, but there's no evidence for many of the sharty splinters either. If sharty splinter admins are 'cord troons, then by the same metric of evidence, so should soyjak.party admins be.
I think that soyjak.party's admins have the most documentation on their wrong doings because of the eyes on them, that doesn't make them any less awful. Kuz, Doll, Root, and Froot were all Discorders with janny cabals that plotted on the site behind the scenes, stirring up all kinds of nonsense drama (the entire doll-max ownership problems, multiple images of the kolymacord and their secret rule sets, and Froot's FNAC discord).
Froot overtly wants to dox people he doesn't like, Angeleno sent false DMCA claims to others splinter owners, Doll and Kuz had their awful lover's spat. It's all Discord drama worthy of equal levels of condemnation.