One recent, entertaining, taboo-breaking examples of the “no-business-model launch” is the Squatty Potty. The founders simply began selling a solution that worked for them.
The unicorn that poops ice-cream came later as a high-risk marketing strategy. The product itself is just a small, plastic footstool. Manufacturing and distribution were relatively straightforward. No business model innovation or analysis was required.
Squatty Potty is a great example of addressing an unmet need, especially given that the topic of toilet-related medical conditions can be taboo. The success of the product, especially given its high operating margin, shouldn't be overlooked. Simple business models can be very effective and profitable.