What's so complicated?
"Blotto" complains:There will be no simple folder you dump stuff in, now you tell it which folders to sync which I guess are then viewable in the cloud, no idea how or if it copies that data to your other machine, how will it cope...What is it that you don't get, and how can you not get it?
If you're upset that you'll have to specify which directories to back up and want to keep the simplicity of a "simple folder you dump stuff in"... What's to stop you from not specifying any other folders, and keep dumping stuff in that single one?