it's thoose kind of people you want to keep away from important stuff, so you know "open source" is the thing, man! ;-)
you can do much with free software. depending on the licence, also unfree software. but then it's no free software anymore
free software is relevant
open source is only one point and can also apply to properity software
there are provider offering this. very expensive, but you might find it reasonable if you rent bare metal servers.
free
open source ≠ free
open source ≈ source code published
it's free software
they pretty much all run linux ootb. Question is: What devices run without binary blobs underneath the OS?
maybe they need the parking lots, for people putting gasoline via canisters in their cars.
sure apple wallet is requierd for it to work? red it like the image part can come remotely by picture 0click (by link preview archived) or via using the wallet app, not both in conjunction.
it's thoose kind of people you want to keep away from important stuff, so you know "open source" is the thing, man! ;-)