Tho build a team, more so if we're taking thousands of affiliates. As to what these TLs are doing, I can guess that they have a tested and effective lead generation strategy. That could be a highly visible and high-converting lead capture page, a great advertising copy or both. Also there's the power of duplication. They would be very skilled at this and have learned how to effectively teach those under them. These factors combine to help them grow their team exponentially.