google on affiliate pages. Looks like they did some minor
update at the end of last month. Anyway, here it is:
Affiliate programs - Webmaster Tools Help
I would seriously say to everyone here, to read what google publishes.
They do not make any of this stuff secret.
But take a lot of it with a grain of salt. They can publish some stuff
and cross their fingers behind their backs.
So, why would I say to read google if I feel they can be wishy washy?
It's a guideline. Pure and simple. Nothing more, nothing less. It's
not a law, and they reserve the right not to enforce such stuff.
But on the flip side, if you want a starting point and/or have been
"penalized," well, you should have been warned.
Now if you are an adsense user, well, there is a little clause about
following ALL google guidelines...just saying.