Collabs
Many people have asked for more than one person to work on a project but it was rejected for moderation purposes.
but I now have a solution. You could share the project but add people to edit it.
In a nutshell

hppavilion wrote:

So collabs… You could make a collaboration into a public project that anyone can see and remix, but certain individuals able to edit the original.

EmeraldDaffodils wrote:

Support.

EmeraldDaffodils wrote:
Scratch really should add an easier collab system. I know many Scratchers will be against this, but it would be so much easier, without ‘For EmeraldDaffodils’ projects or constant remixing, it could be a shared project shared with specific people and they can work on it separately then click a ‘submit’ button which will add it to the actual project.

Plus it will notify you when a change by another Scratcher has been submitted to the project.

The original owner should also be notified via message:

____ wants to make edits to your ______. Click here to see there changes (P.S. Link just takes you to the Scratch homepage )

Tymewalk wrote:

(somewhat based off of Failord's suggestion)
Support if:

• The owner has to accept the changes
  
• The owner can test the changed project before accepting it (to make sure there's no secret pen drawings, hidden words, etc.)
  
• Only Full Scratchers can become editors
  
• The project has to be shared, and everyone can use “See Inside”
  

By the way, here are a few solutions to some problems with this idea:
Two or more people edited the same version. How do we handle this?
The project's owner can choose which version he/she wants to use. The other versions can also be downloaded by either the owner or the creator (this is encouraged to prevent loss of work.)

Someone left a message in a comment. Isn't this PMing?
No. Firstly, that would be visible to all the other editors. Second, it's not disabling See Inside, so anyone can see the comment. While a comment could be well hidden, it's still visible to anyone willing to look for it. Projects solely for attempting to get around the “no PMing” rule by using this could be reported as such. Additionally, comments would be very useful here. For example, you just made a change with a bunch of confusing code, and you want to explain why.

What if a proposed change contains inappropriate content?
Firstly, the original project owner could check and test the new changes, to make sure nothing was inappropriate. Second, there could be a “Report Changes” button. There would also be a warning that if a change applied contains inappropriate content, the original owner's project would be reported.

ke1235 wrote:

I thought of this a while ago, and made some mockups
https://db.tt/VrP1FsWf
https://db.tt/K7A0i7e9
https://db.tt/jZagD1WO

hppavilion wrote:

So collabs… You could make a collaboration into a public project that anyone can see and remix, but certain individuals able to edit the original.

when green flag clicked
forever
set [I support! v] to [infinity]
set [topic is great v] to [infinity]
change [ awesomeness of this topic!v] by (infinity)
set [I support! v] to (I support!)
end

bring
up
my
posts
aka
bump