The bottom line of a new report is that Netflix may lose almost a third of its current subscribers. Raising prices on entertainment when customers aren’t confident they can pay more essential bills can be a regrettable necessity, but it needs to be handled carefully. The same goes for dramatic changes in what a subscription includes. Netflix did both of these things abruptly and confusingly, and now Magid Advisors, a unit of research firm Frank N. Magid Associates, has analyzed what it and other factors may cost the company.