Yes and no. You can install the Festinger Vault plugin and benefit from all the premium features! You can download whatever you need within your daily allowance.
Once a file has been downloaded, you're free to do whatever you like with the file, as it has been licensed under GPL. You can use the downloaded themes and plugins for your client's website too!
Important: You can keep using the item for lifetime (even after the membership expires), however you need an active subscription in order to get the latest updates.
You're not allowed to use the service to stash your downloads - download only what you use. I do monitor the downloads and our system will automatically flag your account if you are abusing this rule.
Please note that if your account's behavior is deemed as a leecher, then your account will be suspended without warning and refund.
In short, don't mess around, let's keep it a fun and happy community!