That's dollars he won't be able to spend on additional books... Consider this: if a customer buys 5 self - published books, 3 of them beeing rubbish... He'll stil have bought 2
good books instead of one, with 4 $ going to the
good authors
nstead of 2 $... And after he'll have posted reviews on the 5 books, the 3 rubbish ones will have less chances of beeing bought by other customers, whereas the
good ones will sell
better, thus enhancing the
good author's sales.