This is a bad idea for affiliate marketers like us. Many times they will have their URL as part of yours. Example is those people that use wordpress.com to host their websites.
However, you are using wordpress, aren't you? - If so, their is no reason to use someone else's service. With a few special plug-ins when they are needed, you can make your website sing on your own. Marcus has good videos on this in the toolbar. Note marcus has over hundreds of video on youtube in which he covers a lot of this stuff. Subscribe to his youtube channel.