[Pyros]

Hi,

The best course of action would be to submit your scenario/campaign in this forum and then to ask the developers to include your work in the next WinSPMBT patch.
If the developers decide that your work meets some quality standards it will be included in the next patch.

Concerning the projects that you mentioned in your post I am positive that if their designers send a note to the developers then these scenarios/campaigns will be included in the next patch.

Just to clarify few things:

Any custom map, scenario or campaign is "somehow" the property of the designer who has created it, therefore the developers can't (not for legal reasons but for moral reasons) include any work without the prior acceptance or request from the designer.

cheers,
Pyros

p.s the above is just my opinion and doesn't necessarily reflect the developers' or publishers' policy.