> (b)(1) It shall be unlawful for a seller of a digital good to advertise or offer for sale a digital good to a purchaser with the terms buy, purchase, or any other term which a reasonable person would understand to confer an unrestricted ownership interest in the digital good, or alongside an option for a time-limited rental...
> (4)This section does not apply to any of the following: ...(C) Any digital good that is advertised or offered to a person that the seller cannot revoke access to after the transaction, which includes making the digital good available at the time of purchase for permanent offline download to an external storage source to be used without a connection to the internet.
https://digitaldemocracy.calmatters.org/bills/ca_202320240ab...
> 2.1 We give you and other GOG users the personal right (known legally as a 'license') to use GOG services and to download, access and/or stream (depending on the content) and use GOG content. This license is for your personal use. We can stop or suspend this license in some situations, which are explained later on.
> 17.2. Our right to terminate the Agreement. If you materially breach this Agreement, we reserve the right to suspend or cancel your access to GOG services and GOG content.
That they have provided you an installer is interesting but not legally relevant; if they revoke your license, your use of the installer is unlicensed and therefore, in theory, prosecutable. (This is of course difficult to enforce, but that’s only relevant if it’s theoretically prosecutable.)
(hint: the LA in EULA stands for "License Agreement", not Bill of Sale...)