However, PTS companies also paid their members for each new user referred to the company (typically US$0.05 - US$0.10 per recruit). It was profitable for a member to garner as many referrals as possible, encouraging some users to recruit members using spam, though officially forbidden by the user's agreement. Minors, many of whom flocked to these business models as an easy source of income, were required to obtain consent from a parent or legal guardian.