Whether you choose to do so in a Sub-Team or not it is up to you. In the end we are all part of Team #37726 and the cause is all the same.
Sub-Teams within 37726, motivates dedicated folders to work together (in a group of four) and it is also a nice way to promote friendly community competition. The dedication folders have to their Sub-Team is displayed through their results at the end of each month; hence, bragging rights given to the winning Sub-Team
The man never feels the want of what it never occurs to him to ask for. - Arthur Schopenhauer