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In there just for collectible items, in my country most of the second hand sellers use facebook.

Yes, as if in North Korea they had access to the Google Maps API or AWS or at least github just to mention a few, what you mention is a bad example. How about a less biased example?

Better write a firmware to avoid this problem i have written in the past firmware for devices that don't affect the user experience including CA's, server domain or ip and other parts that don't require a full firmware update, better to "waste" development time thinking of all future problems that are out or your hand than bother the final users IMO. As a developer you should think every problem you could face or you aren't using the best practices of software development.

Not all startups require VC capital, some of us are just running without venture funding just clients money, some startups are in better shape because are on right market on the right time. You just need to be in the right time.