Your master site should not get banned because of external factors, i.e. you can use whatever you find suitable to drive people to your site.
Your main goal is to deliver most of the type-in traffic to your new site, so you can use 301, 302, javascript/flash redirects, or just ask people to click a link.
The proper way to do this is to implement 301 redirects. However, it will tell search engines that the pages ceased to exist and are moved permanently to new location, so search engines will drop the pages from index. No big deal if you get no or little SE traffic now.
Otherwise you should evaluate other, possibly not so legal methods.
Good luck!