Ryzom is F2P to level 125 in all skills and has limited access to storage. As soon as you subscribe your account you are able to access higher levels. To prevent someone going back to a free account while having higher levels and items the account becomes locked after subscribing the first time - simple as that. You can regain access by resubscribing. This is certainly not new for Ryzom. It may not be the best system but right now it's the only way to prevent this from happening. Only other thing to do is make subbed and unsubbed accounts totally seperate and make subbed accounts start from level 1 in everything which no one would be happy about either. Especially after going to 125 in all skills.