In the exact same way as if you had a godawful product and you want to sell it.
Promote it, talk about it on social media, possibly contract some marketing services, find out who is more prone to purchasing it and focus on that group, etc etc.
I think you are agreeing with me. This process is valuable - it brings your product to people who benefit from it. It does not diminish just for the reason that there might be godawful products some times.
