I think the major aim is to attract the attention of employees at other more mainstream websites into pressing for similar action elsewhere. Facebook and Google

I think the major aim is to attract the attention of employees at other more mainstream websites into pressing for similar action elsewhere. Facebook and Google are the two obvious ones, if either of those decides to join in then the majority of the US will hear of the bill (through, contact with the website, talk among peers and news coverage). Reddit on its own however, will have little affect on the general populous.