money biz

hi currently i am promoting an online dating company. So far been promoting them for a 2 weeks and sending about 70 frees per day. I am doing about 1:50 frees to paid joins. My question is, if I continue blasting for a few months will I start to see more sales comming in or are my sales going to continue to be the same? I know its hard to examine because you do not know my traffic sources but what I am saying is do those "residual" sales start to build up and become more stready?