Hello. Yes, we do remove old and unused accounts on the cloud server once per 6 months. In most cases if you don’t use Blynk for 6 months you don’t need old projects. Also for 6 months we do so many changes that it is better to start again over :). We will try to do not remove accounts anymore. But we can’t guarantee that.
No, you don’t. If you want to “save” project settings you may just use clone feature - Introduction - Blynk Documentation.