Your thoughts are welcomed!
Referrals are pretty much a waste of time for most normal people, but a great business for those who want advertising.
But since Bitcoin itself has no revenue, it has no means to offer any kind of direct benefits for advertising it.
Until here you are right. But there are things you have missed:
* There are plenty of businesses of all kinds around bitcoin and many of them advertise themselves or sometimes, even bitcoin itself. Some as referral revenue, some by ads or posts on social media.
* Every bitcoin holder (and they aren't few) knows that the more people they attract to get interested into bitcoin and become holders, the more the price will grow (not immediately, but still...) hence their investment becomes more profitable. They will advertise bitcoin "for free". And as example, just look at M. Saylor's posts and apparitions.
* Bitcoin price has a cycle of ups and downs. When the price goes up, Bitcoin fills the newspaper pages, bringing a new wave of investors. Some will FOMO and maybe even sell cheap some years later, some will use their brains and do better, some will remain holders and will enrich the ecosystem and may advertise bitcoin themselves.
Imho we are past the days we need every bit of advertising. Bitcoin is already known my media, investors, financial institutions.
So no, imho it doesn't worth going on that path, not for bitcoin itself. For a new bitcoin related business, .. that's a different story.