Also, think about it like this, my friend.
The Bible says that God's grace is a free gift to be received.
Granted, yes it is true; We have to later be responsible with that gift.
But that is not the point here.
The point is that we cannot work for the free gift that Jesus gives to us in regards to Him cleansing us of our past sins when we first come to Him by faith for salvation. Something that is free should be free. There should be nothing we should do to earn that gift (i.e. the cleansing of our past sins). So when a website offers you free services, it is really not free (and there is a catch); They want your money and information about you through some alternative hidden means (Which sometimes gains information about you secretly, etc.). People wonder why they are seeing advertisements about something on other websites when they appeared to be interested on that item on one particular website. They are cross tracking you. To me, this is wrong. They should not know what I desire. I may change my buying habits or tastes. So for them to bombard me with something I may not want anymore is not nice.