Affiliate program  

Well the link you have provided is not working but still I searched for the website and found it . Actually this is a new site for me so I cannot really comment as of now for its validity but I can recall a similar site called www.zazzle.com where many people are earning money as affiliate. The proofs of earnings from zazzle have been shown on Blogs. Zazzle is a free to join site so if in this nerdyshirts site you do not have to pay upfront then you may try this site for getting a first hand information however if someone mentions here about the legitimacy of nerdyshirts then it would be really helpful through your discussion .