They each put a quarter share of $1,000, per the article:

The four cofounders each own 25% of the company, and at launch each put in $1,000 to cover initial costs.

Customers love the design choices and the screen brightness. Customers also really like the device weight and portability. Customers are unhappy with spontaneous battery fires and report several house fires. Customers are happy with the warranty policy, unless they’re a homeowner. The red and black model is very popular.