To me, of course, this is a bad idea. It seems like their message is clear -- that if you can't write, you can't be an Internet marketer.
While they may be 50% correct, there are other ways to market or promote a product online without writing.
But before I give you some ideas, I'd like to say that if you can't write, take your time to hone your skills.
Why?
Because well-written articles get found on search engines even without making an effort to promote them. People who use search engines have a certain intent, and that's to find useful information. If your article gives the user what he is looking for, there's a big chance that he'll consider what you're promoting.
Aside from that, Google loves quality content.

- oDesk
- Fiverr
- iWriter
RELATED: How to Use iWriter to Get Quality Content for Your Site - Complete Guide
Back to the main topic, here are some affiliate marketing techniques for non-writers.
- Youtube marketing
You can create your video reviews and post them on Youtube. Youtube is the second most popular search engine next to Google, so you won't be left with 0 views. The best part is, Youtube videos show up on Google SERPs with high rankings.
- Facebook and Twitter marketing
Amazon, for instance, allows you to share items from the site via Facebook and Twitter. To make these posts better-looking, go to your Amazon Associates account and enable the Associates Site Stripe Option. You can find this in your Account Settings.
- Be active at Keep.com
While watching my favorite shows, I "keep" items from Amazon. Here's a tip. Find the nicest and most expensive items to share at Keep.