You can manually select where the sync folder is at and most of them allow you to name the folder what you want.
Now why are you wanting 3 online companies to backup the same exact folder??????
Yes you get the redundancy in case you loose both your local folder AND a single online backup.
But you then have 3 softwares running using your computer resources, and not one, not two, but three places online that has your data that could potentially get hacked and taken. Seems like way more lost then gained for the 1% chance both your local and a single online source have lost the data.