Full credit to @hangryfordeals for this.
If the link does not work for you, try this one, courtesy of @wangsk
Somewhat of an OzReminder, it's from this forum post from a while ago but a decent deal that some may find useful.
I was playing around with Grammarly, saw that the Premium Annual Plan normally costs $12 USD per month. With this link, it's $5.52 USD a month, which is a decent saving. It's a one time payment of $66.23 USD, which is roughly ~$96 AUD for 1 year of Grammarly Premium.
What is Grammarly Premium, and how is it different from the free version?
Grammarly Premium is a paid upgrade that offers over 400 types of checks and features, checks for grammatical errors, provides vocabulary enhancement suggestions, detects plagiarism, and provides citation suggestions.
While the free version of Grammarly allows you to access some of the features we have to offer, Grammarly Premium is the ultimate tool to ensure that everything you write on the web is captivating, precise, and easy-to-read.
For more information about what's available, please visit this page: https://www.grammarly.com/plans.
Is it worth it? The premium version.