Well, here is some of the promotion codes known to me, note here just in case I need Feel free to add more

6.95$ .COM Domains (Register,Renew or Transfer)
cjcnot695
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Save 1$ on your order
cjcdeal74
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Save 10% on your order
cjcdeal71
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Save 5$ off your order 30$ or more
cjcdeal75
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Save 10$ on your 50$ or more
cjcdeal76
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Save 15% off your order 75$ or more
cjcdeal78
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20$ off your order 75$ or more
cjc20off75
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Save 25% on your order 75$ or more
gds0124a
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Save up to 30% when you renew your Shared Hosting plan for 12 months or more!
gdp0642a
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Save 20% on shared hosting plans
cjcmnt20h
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Save 15% on shared hosting plans
gdp0704a
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Save an extra 15% on WebSite Tonight 12/24/36 Month plans!
gdp0704p
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Save 50% on Standard Single Domain SSL Certificates!
you should go with link.just for my blog visitors.
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Private Registration 3.99$/year
gdp0623a
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30% off .NET Register,Renew or Transfer)
gdp0716a
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Save 30% off .COM .NET .ORG .BIZ .US .NAME
gdp0627e
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30% off .Co.Uk Domains
gdp0611w
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30% off .Com .Net .Org .Biz .Us .Name New,Remewal or transfer
gdp0627
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20$ off Basic super or pro reseller plans
gdp0616m for all reseller plans
gdp0704m
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Save 20% on your order 50$ or more
gdp0629b