eBook typos

eBooks can be criticised for the prevalence of typos, and often are. Poorly edited work spoils my enjoyment as a reader. In fact, it can make me throw aside a book in disgust and anger. However, as an ebook publisher it's a different matter. To produce very reasonably priced ebooks from original work fast, I cannot spend time toothcombing each submission. The onus must be on the writer to submit polished work. This is something of a dilemma for me. I want to keep up standards but I also need to generate activity on WritersReadersDirect.