Probably more like what a Japanese company recently did, they gave out free Bitcoin to all shareholders as an account balance on a crypto exchange they owned.
But what immediately comes to my mind is Bitwage, where you can pay your employees in Bitcoin. They get to set the % of salary they would like to receive in BTC every month, all or 10%, up to them. You could offer to pay all their performances bonuses in BTC too as incentive. But in my experience, only something that doesn't cost them anything would work.
Could work, but most people don't like additional work on top of what they already do.
Agree 100% with you that "only something that doesn't cost them anything would work" in terms of increasing adoption.
We've talked to many companies, workers, founders, CEOs, etc., and while interest in crypto, owning crypto is generally high, not many people are willing to take their entire compensation for it (a la Bitwage). This is why we've built a more passive way to receive for employees - more as a perk, a reward, similar to how Lolli makes BTC a reward for shopping. And so all the companies we work with today treat BTC as a perk alternative that an employee can choose if they prefer it over, for example, movie tickets or gift certificates.