1. Bakery pre-orders
Take orders for Saturday by Thursday. The catalogue is six items, the hard part is a cut-off time, and that belongs in the shop description rather than in a pinned message.
2. A plant shelf
Plants sell on photos and on care notes. List light and watering in the description and you remove the two questions every buyer asks, plus most of the complaints later.
3. Art prints
Same image, two or three sizes, one wall photo each. The packing note does more for conversion than another close-up of the paper.
4. Secondhand books
Single copies, honest condition notes, shelves as categories. It works because taste is the product and a chain cannot copy yours.
5. Digital packs
Presets, templates, sample packs. The file goes to the buyer in the chat right after the order, which is the whole reason this category suits a chat shop.
6. Bookings for a service
A barber, a tutor, a studio. Availability and a booking block replace the back and forth, and the reminder lands in the same thread as the booking.
7. Curated gift boxes
Three things at one price, with a gift note. Bundles carry this, and gifting is the order type least likely to go to a marketplace instead.
Every one of these seven is small enough to launch with six products. The free App plan covers up to 10 products and 150 orders a month, which is enough to find out whether the idea has buyers before it costs anything.