I am.. beyond the point of befuddled. Sin Sack-tan?

those are not sin sack

Ya, thats not the "Sin" Kanji.

henmere explained this in post #1080344

henmere said:
Zannen na Hito created this girl as "a daughter of 農袋 (Farm Sack)."

The original Farm Sacks made their first appearance in Nakaoka Naoki's Nico Nico Douga video. -> http://www.nicovideo.jp/watch/sm8716121
Nakaoka called them "農民A (Farmer A), etc." However, viewers of his video started calling them 農袋. They are depicted as Aki Minoriko's believers.

See also 農袋's Nicopedia article.

should we make a tag for this farm sack child or should we wait for more uses of this character?

It seems wrong to call them sin sacks, but the idea is effectively the same.

"a daughter of 農袋 (Farm Sack)." has appeared Here from two diffrent artists.

I think this constitutes as a successfull meme

She's cute, and anything that brings more attention to the Aki sisters is good.

Zekana said:
should we make a tag for this farm sack child or should we wait for more uses of this character?

There are only three images of her (農袋子) on pixiv and there is no pixpedia article of her. I think it's premature to make a tag.