That is all already assumed by the word free, if one understands it, which most do not.

Nothing is truly free as people commonly conceptualizer it in their mind. Just alone receiving something at all comes with strings, even if they are not apparent. There is a term that describes this issue rather well in German, “vogelfrei”. It refers to being as free as a bird, which is assumed to be a great thing, but it also means you are free to be hunted and predated.

Free is also the theme of a deal with the devil. I will self-censor here a bit about what is the devil, because the devil’s censorship is more consequential than if I do it to myself for the time being.

Google Maps is "free" in the same way healthcare is "free" in many countries. The usage of the word seems fine.

There is no free lunch. Its more like you expect some idealized absolutism in market economy from people who need to eat and pay their mortgages. Its uncommon to meet an adult with such expectations, its mostly reserved for children up to certain age.

Hear, hear! One suggestion: costs a drop of blood.

"Costless" or "zero-payment".