Two-tier is an enticing feature of a particular affiliate program wherein, affiliates are allowed to sign-up additional affiliates below them. To ensure that when the sub-affiliates otherwise called second tier affiliates, earns a commission, the affiliate above receives a commission too. Theoretically, affiliate programs can have multi-tier program with infinite quantity of tiers, however, there are practical limitations. As tiers increase, the affiliate program draws far more webmasters who are mostly interested in gaining profit from other’s function and effort. Two-Tier affiliate program is also recognized as Multi-Level Advertising. When you sign-up for an affiliate program, you happen to...