We're Charlie Brown running towards the football repeatedly. We need to learn a lesson here. "We're the good platform devs" branding doesn't mean a company will do the kind thing by their true believer users (post-acquisition, post-cash-flow-belt-tightening, post-IPO, etc)
There ought to be a platform on which new coders can build a free simple web app in a playground, and know it will be accessible in 20 years. If a company wants to use "free easy backends" as bait for capturing growing companies' future costs, devs should hold them to long-term persistence and at least an off-platform future migration path. See also Parse, Geocities, etc
Use some % of the money and put it in to an OSS migration path or a fund to pay their own future AWS bills, c'mon.