It is getting harder and harder to find a Godaddy .com renewal coupon with big discount, I mean, over 30% off.
Today I had spent 2 hours searching in vain, and was thinking I had to use some voucher with only 20% off for order over $50. The code is not specific for .com renewal, but general for all Godaddy products. It means all Godaddy products can be marked at least 20% off, and it is a sales technique which I do not like. So I do not regard 20% off as a REAL discount. Anyway, it is off topic.
At last minute, I came across a .com renewal coupon 35REN414. The person who revealed this coupon said it was 35% off. Actually I got 40% off when I used it today. Since I never got such a big discount on .com renewal before (the biggest I had got was 33% off), I immediately decided to use code to renew .com domains to a maximum length.
Longer registration period, better SEO result. And domain renewal price is rising. So it is a good investment, I think.