we should tell them of advantage of W3 member, first of all we should tell about contest where they can win upto $200 for refer other W3 member, then we should tell about every month they get free tc and mrp and i think we have to tell about marketing tragedy with w3 member, hope they will convinced. after all if anyone W3 badge will see then public will know that they are active member its a very plus point for them.
