Heather Meeker has written about "direct licensing", without rights to sublicense, in at least one of her books. I'm sure she's mentioned it somewhere online, too.

The Blue Oak Model License takes reliability a step beyond even Apache 2 and GPLs, with an express statement of irrevocability (in plain terms) and an express statement that terms are both conditions and contractual obligations. https://blueoakcouncil.org/license/1.0.0

If you're really down in the weeds, probably best to send me up an e-mail.