I'm trying to create yahoo accounts, and I am having a lot of trouble. I am using Ubot, I am clearing cookies, using proxies (and tested without), using random delays when filling every element on the page, using good US based address information, changing user agent every run. Doing everything I can think of to eliminate any footprint. When I fill out the form, right now my bot does not hit "submit" it just fills things out while I am testing and when I manually hit create account it just takes me to yahoo.com. I went to my browser on the same PC/IP and went to edit.yahoo.com and did everything manually, and it created an account no problem. I used IR ID Creator, and it creates them fine as well. Anyone know what Yahoo is using to determine I am using a bot and not allow the creation?