Does the sender & receiver from content both need to have a scoopa-platform?

Only the sender needs to have a scoopa-platform. In this case, let’s assume that’s you. So you would open up a scoopa platform under "your favoured" (for example). Then you invite your customers and employees to this platform by mail. Alternatively you can also send direct-links to the assets you want to share simply by mail (so not always a need for the user to register or sign-in). It's that easy. For scoopa the receiving side never needs any hardware or software. This is one of the advantages in comparison to other file-sharing and file-transfer solutions.