Hi, I have some codes that i would like to hand out to my visitor. When they click a link like "Click here to redeem code" it will reveal one line from a .txt file. It will only show that particular line to them only and they cannot click the link anymore. The line will be removed from the .txt file or blocked so other users cannot grab the same one. Please let me know how much this will cost. Also if you already have a script that works i can buy it off you. Hurry it's urgent!