I hate that this is true. It's the worst part about selling stuff online IMO and I found that you have to spend so much time doing it. In many cases, selling something online can be optimized to the extreme such that spend on marketing should be as high as possible and spend on the product R&D, manufacturing, support, etc should be minimized as much as possible. This equation gives you the most profit, but also gives the customer the absolute worst product that is possible to sell.
Capitalism doesn't really have a solution to this problem that I've seen yet.