Keepuptodate script - copy files to .zip - possible?

Hi.

I have a keepuptodate script running 24/7 and it works amazing! Now im wondering if its possible to transfer the files into a .zip file or pack the files before or after they are transfered?

No. You would have to code this with using of WinSCP .NET assembly (and some language like PowerShell).
For example see:
https://winscp.net/eng/docs/library_example_keep_local_directory_up_to_date
Though with local files, you can use FileSystemWatcher instead of polling the folder for changes:
https://stackoverflow.com/q/29066742/850848