Most recurring threads have parameters/rules for posting, but as we've seen it's hard to quantify the difference between chubby, fat, BBW, &c.
From my understanding and based off of /d/ threads:
SSBBW/BBW = huge, girls that, in real life would be 300+ lbs, with many depictions of impossibly large women which in my opinion is disgusting.
Fat = large assets with a round potbelly
Chubby = what we see in this thread.
I did post the Nozomi here >>2099521
and I agree that it is more fat than chubby. >>2099938
The angles are odd, but due to the huge proportions I'd understand why it'd be "BBW"
I think a possible solution would be to create a Fat thread alongside the Chubby threads, but I don't think there is enough content in both areas to keep the threads going... BBW/SSBBW, belly stuffing and weight gain are probably better left on /d/.
/d/ does have a chubby thread AND a BBW thread, but most of the images are of BBWs...