@dinos69 what do you mean by partnership?
Did you mean that the team should look for a partner?
I am confuse with your thoughts.
I doubt that they would be looking for a partner. Even with just a few developers handling the application, it would be difficult but possible. When the need arises, and when this application has emerged as one of the big applications, they would probably get another one.
The "partners" will be those developers creating the apps, and to some capacity the users as well. These are different relationships but I would think they all represent some kind of partnership.
It would probably be great if they have a lot of developers in the company, however keeping it small would limit their options and ideas. It would be like a team effort where it would be easier to agree to something if they are limited to their choices. Hence, if they are thinking of upgrading their application, and they are in need of new ideas, they might think of taking one more for the team.