There is a bit of logistics to consider:
First, big collection are multiple GBs in size and take a while to upload (assuming you have enough spare space from a cloud provider to begin with - for example my Google Drive is already cracking 2TB).
Second, the ones with a lot of files will merge their .ztds to stay within the .ztd file limit. If there is something in the file that you do not like you will have a hard time removing them.
But yea, these are just caveats to consider. There are probably several folks who have uploaded their dlupdate folder before.