Email snippets and microsite snippets are non-transferable due to the nature of the HTML builds and the differences in being responsive i.e. microsite snippets are built to be viewed in browsers such as Google Chrome/Firefox/Safari and email snippets are built to be viewed in email applications such as Outlook/Apple Mail/Gmail/Yahoo etc. so require different HTML coding.
There is a bank of snippets that can be used in both email and microsites which can be used and edited to match your branding, or contact your account manager if you would like a more bespoke option.