It's true that a 3rd party may not charge what you'd charge and your income may decrease, but your costs would also decrease somewhat. If another site hosts yo

It's true that a 3rd party may not charge what you'd charge and your income may decrease, but your costs would also decrease somewhat. If another site hosts your software too, that's less potential load on your download servers to handle the actual number of users. With some hosting providers, this directly reduces the amount of money you spend on web hosting (whenever less bandwidth is consumed). And even if a 3rd party hosts your software, they can't just take away your copyright and claim that they wrote the software themselves. The software remains associated with you so the 3rd party's hosting provides a bit of free advertising. Maybe you didn't spend money on advertising, but some people do; and you could arguably spend less if enough 3rd party sites make it known that your project exists. This probably doesn't amount to much but my point is that 3rd parties aren't creating complete freebies; their actions do help a little.