Quick summary: If you are an experienced affiliate, please use this link to sign up – the interface is pretty straightforward and you get email notifications of all sales and secured details of numbers of clickthroughs, and a US$20 sign-up bonus added to your first commission!
Commission is 50% per sale and paid via Paypal on the 7th of the month following all sales! Make sure to check out the Affiliates Frequently Asked Questions page before signing up!
More information:
Do you want to earn commissions on sales of the Language Hacking Guide and Speak from Day One Course?
Do you have your own blog / email list? Want to make some extra money for very little work?
I’d like to get my Speak from Day One video course & Language Hacking Guide out there to as many people as possible. So to encourage others to help me, I’m providing a 50/50 cut for everyone who refers a sale using what’s called an “affiliate link”. That’s $48.50 per sale of the Language Hacking Guide full version (or $43.50 on the English-only version), which goes directly to you!
You also get $20 on top of this just for signing up 
(Added to your first commission)
It’s very easy – all you have to do is click here to sign up with the relevant details as an affiliate. Once logged in, you will find the interface easy to navigate and will be given a special link unique to your account: your affiliate link. Setting this up is completely free.
Any time someone clicks that link, their browser is given a cookie (with no expiration), and they are sent to the main sales page of this site to see my video and further information. If the same person decides to buy AT ANY TIME (5 minutes later or 5 years later, using the same browser without cookies cleared, even if they click someone else’s affiliate link AFTER yours) then you get your deserved percentage! You will be notified of every such sale immediately by e-mail. On the 7th of the next month you will be sent all earnings via paypal, which you can transfer immediately to your bank account. Easy!
Spamming salesmen need not apply! Only those who genuinely want to promote this guide and help others learn languages too.
You can use the banner below or create your own, on your own blog’s sidebar, or write a review of the Guide as a post, remembering to use your own special link. Check it out for yourself before you promote it! I’m sure you can personally benefit from the advice in the 30,000 words, audio, worksheets, multilingual updates and video course before making money from it yourself
Looking forward to working with you!
Here is a useful banner you can use on your site (Right click & “Save as” to upload it to your site):
