Ask HN: Are Royalty Investments attractive options to investors?

A royalty investment is where an investor exchanges capital for royalties on one or more products, sometimes capped to a mutually agreed amount.

I believe these aren't pursued often because it's a complicated and expensive model for most business structures. As a result I'm having a hard time researching the general consensus about it.

Suppose I had a startup where it perfectly fit the model. Our company would sell products that are sold once to a single customer. Investors could perform a royalty investment by granting us capital once, then receive royalties on those kinds of sales until certain conditions are met.

Compared to traditional equity-based investments, I feel this arrangement can benefit both parties if arranged correctly. Companies can retain equity and investors could see larger returns quickly, especially if no exit strategy was being considered at the time.

How does HN feel about these types of investments?