Yes. At least, if you want to enjoy most of the benefits of premium downloads. Any type of premium account from filehosting sites or a paid download membership from debrid or multihoster-type sites like Linksnappy really require that you have a higher-speed internet connection. Free downloads from filehosting sites are generally limited in speed, which my best guess at the average is 200KB/s, which is about a 1.5Mbps-2Mbps connection from your ISP. These speeds are common for DSL and 3G mobile or other wireless internet networks. If your internet service’s maximum download speeds are around 200KB/s, it probably wouldn’t make a lot of sense to purchase any type of premium account, let alone a multihoster account as you wouldn’t be able to download files much faster.
However, at the same time, using a multihoster service even if you have a slower internet connection, you are able to bypass download restrictions and limits imposed by filehosters when you’re downloading using a supporting multihoster service. So, from that perspective, using a multihoster to download files even with a slower internet connection can make it a lot easier to download all the files you want. Really, it’s up to you to decide whether the “unlimited” downloads or close-to unlimited downloads are worth the investment even if you don’t have the fastest internet connection to download files with.