Dynadot seems to be offering
unlimited .com registrations for $5.99 apiece for the entire month of March.
Promo code needed, see official terms and conditions here:
https://www.dynadot.com/community/help/question.html?aid=896
I already registered a few so I can confirm it's working. I thought more people should know : )
Did you read the disclaimer?
The terms are kind of confusing.
Here they are, from the site:
Get $5.99 .COM registrations with coupon MARCH599COM & $7.99 .COM transfers with coupon COMTRANS4! Restrictions apply
.COM registrations
Dynadot is offering $5.99 .COM registrations all of March with coupon MARCH599COM! Please note this excludes re-registrations.
What is considered a re-registration?
When domains are released from the central registry back to the public for registration, there is a window where they qualify as re-registrations.
Domains within the re-registration time frame are identified as domains previously registered, whereas domain names registered after the re-registration period are seen as brand new registrations (i.e. not previously registered).
The re-registration window starts from the time the domain name is released and goes until 11:59 EST that same day.
So if you want to take advantage of the $5.99 .COM sale on a newly released domain, you would need to wait until the re-registration period has passed.
Otherwise, feel free to register your heart out with the $5.99 coupon!
.COM transfers
In addition to our competitive .COM registration sale, we are also offering $7.99 .COM transfers with coupon COMTRANS4.
No restrictions here, consolidate as many domains as you like before the sale ends!
When do the sales end?
Both the .COM registration and transfer sales are valid now and until March 31, 2020 23:59 PST.