Last 24 June 2020, I tried renewing the PositiveSSL of this blog using the keyword promo that was sent by Namecheap in my email last 11 June 2020.
There was no discount.
Then, I checked again and chose a one-year duration. It worked.
I paid $4.44 only for an original price of $8.88 and I am just waiting until the current PositiveSSL will expire then I will install the new one.