As long as you maintain any membership level, you'll be able to continue to log into i65 and use your credits.
However, your current marketing materials no longer be updated.
You will still maintain access to the materials in your marketing materials folder that have been created for you previously, but only the marketing materials included with your new level will be updated.
For example, if you're downgrading from a Starter level member to a Basic level member, you'll still have access to the presentation, sales flyer and case studies in your marketing materials folder. However, since the Basic level does not include customized sales materials or presentations, these files in your marketing materials folder will no longer be updated.