Answer:
If more writers began publishing books online, many libraries, book stores and other businesses that depend on paper copied books to keep afloat, will had a dramatic drop in clients and sales. Eventually, these businesses and companies will go out of business, having been outdone by the more popular online books. On the other hand, many websites will be making money from those who read from their sites. The authors will also have most likely made deals with these sites, earning money for every new read their story gains.
Hope this helps you a bit! Just a hishschooler who should really be doing her own homework but is avoiding it :))