Say Fly will eventually get acquired or IPO, their founders will justify it that they could use that money to work on Fly's mission statement or if they've had their fill of servers go on to build further startups in Fusion, AI, or Space Technologies or even give to charity (take your pick).

When they do get acquired/IPO the natural bureaucracy of large organisations and shift in incentives will set in (we've been here before with Heroku/Salesforce and SendGrid/Twilio...) and they'll become slow, more risk-averse, and ultimately less innovative catering for enterprise and other large businesses (where the easy corporate money is at) instead of scrappy startups and curious hackers.

This is where Fly 2.0 comes in 5 years down the line reaching No. 1 on Hacker New, where utilising the latest technology they'll create a completely new and innovative solution that will solve the current problem even better than now and they'll start by catering for startups and hackers until they themselves get acquired/IPO.

This doesn't mean it's necessarily a bad thing - founders get a chance to cash out, consumers get cycles of new innovation.