Just charge $1 Sirec, and you will be within the guidelines.
I don’t see any issues with free resources being locked, but if its against the rules just charging $1 will make sure that you don’t get in trouble.
Please see the release rules you are breaking the following:-
Free releases: Releases that are released for free must contain a direct download and may not be Escrow protected, you may include a Tebex link but it may not be the only download.
Please correct this to have the post relisted thank you