A quick question. I have a website that sees an average of 11,000 unique users a day. I offer digital downloads and see about 5,000 unique downloads a day. I do ask users to credit my website if they use the digital product (which is free) but not many do.
Anyway, my question is, I want to start giving away a free upgrade to our premium content is a user creates a back link on his/her website or blog. If I do this, is it a bad idea? Would the search engines see it as buying back links and throw me a penalty?