wide star
They do not randomly disappear, And they will remove a key if it is leaked or suspected of being leaked.
Including your key in the binary, is not the correct way to use a key. Anyone who runs the app will be able to gain access to your accounts just by packet sniffing.
And if your key is being used at 16 different locations at once It will look compromised considering you are not supposed to give out your key.
Proper way to use a key, is develop a server to make the calls and have the apps call your server. One central key use.
lean geyser