This is the first I've heard of Edsu as well, but when I checked out NoteToMe, the first thing I noted is that you should create an account first. It's probably not inherent to the protocol, but the nice thing about RemoteStorage is that the default library already starts with localStorage first, and allows you to only sync that data to an account later.

Compare https://litewrite.net, a RemoteStorage app presumably similar to NoteToMe. You can start writing immediately, and sign in with a RemoteStorage account only if you want that data to be available elsewhere as well.