Here is a Godaddy Trick:
The $5.99 for 3 domain trick still seems to be working. I went to Google typed in Godaddy Coupon Code, 5.99 and used a code from this thread was able to purchase 3 .coms!
Use this live link for a direct $5.99 coupon: godaddy.com/domains/search.aspx?isc=gofnl114a
see the “gofn1114a” at the end of the url? once you use that link, change the coupon code at the end of the url to another coupon code & then paste it into the browser to use again