Should look for modern analogs.
RedHat, like all other distros, was initially a boxed product- CD ROMs- and support, consulting and custom work was available, arranged via email and phone call. Eventually RHEL was set up as a subscription- not SAAS- with stable releases (of CD-ROMs) and enterprise tier (phone) support. Sure, people shared links and experiences over USENET but there was no "growth hacking" in 1993, not in anything like its present form.
The world is completely different now. There are zillions of more modern examples of open source/open core/saas/support business models, free vs enterprise pricing, etc etc.
RedHat was a 1 of 1, and that ecosystem is gone. Find another exemplar.