Re: Launch cost
SpaceX's 2024 revenue was around $8 billion, and profit (EBIDTA) around $3.8 billion. If you assume Kuiper can also earn a few billion profit per year after a few years operation, it doesn't take that many years to recoup the estimated $20 billion launch costs. But as the article states, the costs are relatively small beer for Amazon, and they're probably a lot less bothered about it being profitable (in terms of recovering the initial costs) than they are about becoming a major player in the LEO satellite internet market. I assume like Starlink, the satellites will have a lifespan of just a few years, but as you say, New Glenn will be reusable eventually, so the costs of maintaining the constellation could eventually be comparable to SpaceX.