I sign.
Why?
I participate fairly often in the minishops, mainly for adoptables but any other services were swarmed or unseen because they were hard to find in the swarm of adoptable threads that are suffocating the rest of the shops. I mean, don't get me wrong. I love adoptables; However, if someone posts another type of minishop thread, it shouldn't be skipped over or hardly noticeable because no one can find it while wading through the adoptable shops hanging around.
Adoptables definitely need a subforum, they are very popular in many different sites and this one isn't much different. Deviant Art, Tumblr, Fur Affinity, and other art sites have popular adoptables being released frequently. Gaia users have also made Gaia part of this adoptable shop trend. Since it's becoming so popular, making the minishops and adoptables separate would prove to be a good solution to the endless swarm of adoptable threads.
Not only will a subforum clear up the minishops, but it will also make everything look neater. The adoptable sellers will be able to make their adoptables for the buyers that are looking specifically for what they're selling. The minishops can become a cleaner place and the shops that were barely noticeable before, now have a chance to shine and grab a few customers, maybe even a few regulars.
There's my two cents on the matter. Not sure if anyone's said any of this but if so, oh well.