Is there anyone who used to give free downloads for ebooks and then switched to using CPA LEAD? I just think if I do that nobody will do the surveys since they might think they are getting scammed.
Just as long as you explain it for the visitors I think it'll be ok. Put up a big post on the first page saying that you have to put up a gateway to support the server costs etc usually people still prefer surveys over paying.
Yes. And not many people willing to do the survey,they can find the download at other site. In return,you lose traffic.