Jur,
Well, to me whoever contributes to TCL whether with code, architecture design or strategy and participates to TCL benefit is deFacto a team member, even if it is an 'extended team' concept. I believe TCL is not a closed corporation but rather a project created and managed by RobertS, which attracts a fantastic team of people from various parts of the world, who contribute with their development skils, architecture design and strategy ideas. Those are attracted to this project who can appreciate the vision of TCL as well as dexterity of the project implementation. But it is thanks to the management being in the sole hands of the project creator that the direction of this project stays on course.
This is the way I see it, even if it is possible there could be some who disagree with such assessment.