Money is a symbol of exchange. A high-value, abundant exchange will transfer those symbols over to your own account in abundance. That’s only fair.
Poor or scammy marketing offers products or services that aren’t abundant in their nature or won’t create abundant results for their buyer, and aren’t worth any price asked.
Your backend is designed to tailor-make your offer to their wants. With content products, you can offer extra products once they decide to acquire the first product. This is called an “up-sell”. Or, if they decline a product you offer, then you can offer a smaller version at a lower price – called a downsell.
And the most valuable product/service you can sell is purchased through a continuing payment plan. Like a subscription or membership service. They continue to pay you monthly or annually for continuing services. They are paying you to get insider benefits for being part of your team.
The above four paragraphs tell you the model of any decent backend. The enable you to provide lots of choices for the buyer that can improve their lives.
You’re in the job of helping people find what they are already looking for.
Now you can see how this fits with our definition of promotion above. You simply need to find hosts who have an audience that are looking for the products or services you already have on offer (or could readily produce for them).