Whether a hosting account meets the system requirements of your sites and how easy it will be for you to manage that account are two rather important things. If you experience any difficulties or your sites just can't function on the web hosting platform due to the fact that they were designed to run in a different system environment, it would be rather inconvenient if you cannot get a complete or prorated refund and a lot of companies on the market have such policies. Thus, you will end up losing money as you won't be able to use a service you've paid for. To be on the safe side, you'd better check the refund policies of any provider before you obtain a web hosting plan, so in case you cannot use the account or simply decide that you do not want to use it for whatever reason, you can request your money back.