Find the answers to your questions in our Knowledge Base
The trial version of Market Samurai is identical to the full version - the only difference is in how your account is listed in our servers - you have access to everything during your trial.
After the trial expires, only the Keyword Research and Domains modules remain functional, as they are free for anyone to use.
(these modules are also available in the free Domain Samurai product)
You get the same support and updates as a paid customer while you're in a trial.
A paid customer gets access to all features of Market Samurai forever, with no charges for updates or tech support. However, heavy users of the Rank Tracker module may need to pay a small monthly fee - see the Rank Tracker section of the Knowledge Base for details.