It's well known that a lot of people do not like Lion Brand Homespun. The creator of the group apparently knows that too, otherwise why create a group stating that there is a place for this yarn?
The screencap is humorous, even if it was short lived. As of right now, the group already has 10 members.
I don't think Chel was purposely making fun of the group's creator, only pointing out the irony of what she saw at the time.