The first is Alexa Tracking, backed by Amazon.com, but read their terms:

“ALEXA’S TOOLBAR SERVICE COLLECTS AND STORES INFORMATION ABOUT THE WEB PAGES YOU VIEW, THE DATA YOU ENTER IN ONLINE FORMS AND SEARCH FIELDS, AND, WITH VERSIONS 5.0 AND HIGHER, THE PRODUCTS YOU PURCHASE ONLINE WHILE USING THE TOOLBAR SERVICE. ALTHOUGH ALEXA DOES NOT ATTEMPT TO ANALYZE WEB USAGE DATA TO DETERMINE THE IDENTITY OF ANY ALEXA USER, SOME INFORMATION COLLECTED BY THE TOOLBAR SERVICE IS PERSONALLY IDENTIFIABLE. ALEXA AGGREGATES AND ANALYZES THE INFORMATION IT COLLECTS TO IMPROVE ITS SERVICE AND TO PREPARE REPORTS ABOUT AGGREGATE WEB USAGE AND SHOPPING HABITS.

IN ADDITION, WHEN YOU PERFORM SEARCHES USING THE SEARCH FUNCTION AVAILABLE ON ALEXA’S TOOLBAR SERVICE SOFTWARE VERSION 6.5 AND HIGHER OR ON THE ALEXA WEBSITE, YOU OFTEN WILL BE TAKEN TO A WEBSITE DETAIL PAGE AT AMAZON.COM. IF YOU HAVE AN ACCOUNT ON AMAZON.COM AND AN AMAZON.COM COOKIE ENABLED, YOUR SEARCH RESULTS WILL BE TRANSMITTED TO AND LOGGED BY AMAZON.COM AND MAY BE CORRELATED BY AMAZON.COM WITH ANY PERSONALLY IDENTIFIABLE INFORMATION YOU MAY HAVE PREVIOUSLY PROVIDED TO AMAZON.COM.”

This amounts in my opinion to spy ware.

The other link recommended by the reader was WP Affiliate Elite, which allows you to link via key words in your content to sites of your choice in an effort to make money. The cost of the WP plug-in is about $50. Well, fine if you like the utility, but a lot of work actually  finding associates who will bring you money.

Fiunally, I classified the comment as spam.