1. How?
2. Reward them with what?
3. Fans are already promoters.
4. Why is this a good thing?
5. This is just describing fandom, which already exists?
To the hopeful new rent seeker, the pitch is obvious. To everyone else, the provided rationales tend to sound like a whole lot of bullshit.
2. With your own coin, obviously. If the coin has value aboard a cruise ship, or events, etc. then everyone wins. There are many businesses that can benefit from selling unused inventory, and they may as well sell it for coins earned for things like bring other paying customers, contributing great testimonials, content, etc. Imagine being able to go on stage if you earned enough "loyalty points" or whatever.
3. Loyalty points have been around forever. And no, fans are not already promoters. I know in my own personal experience that even INVESTORS who invested in your company often sit back and hope that you'll make them a profit somehow, instead of bringing others in behind them. Let alone people who just come to a show. The easier you make it for them, e.g. having your own site with custom links that they can share and earn "affiliate revenue" in your own coin, the more traffic you'll get.
4. You get more traffic. More audience. More capital. More money. More loyalty. Independence from having your speech restricted or demonetized. Look at all the youtube personalities openly saying that they can't say this or that. Many comedians and performers are sensitive to being censored.
5) Also you can easily collect money from a global audience, and pay out to a global audience, without being a central bottleneck (FinTech) and without being required to post surety bonds as a "money-transmitter", instead letting people transact directly and you don't have the liability, and they don't have to trust you like they trust Binance or FTX or Celsius with custody of their funds etc. etc. You just provide the Web interface, they do the transaction, facilitated by IMMUTABLE smart contracts.
In the regular system risk is passed upward to regular bank you deal with, then upward to the government bank. The frustrating part here is that the regular bank makes all, or very nearly all, the profit, yet passes on the risk. This gives them enormous amounts of power, through wealth, which is far from ideal. But, much, much worse is the concept of removing the regular bank, and government bank, replacing them with a random person online. And passing the risk downward to the users of the currency.