In fairness to those who were against the OP's idea, do recall why we're here. We don't tend to approve of snake oil, and we certainly will call someone out on the carpet for a questionable product.
A scenting product for gasoline may or may not be harmless. Let's assume it's completely harmless. Changing out Mobil 1 EP at 2,000 mile OCIs is harmless, too, but we'd still point out the folly in doing so.
There are too many people out there trying to make a fast back based upon a questionable product that serves little to no purpose. I see no need to encourage or assist them.
If it were a quality fuel injector cleaner that happened to smell nice, great. If it's an additive just for scent purposes, don't expect me to buy it, and don't expect my help in marketing it. And, if you ask my opinion about it, I'm going to provide it, favorable or not.