Hi ..
i am new to this forum... lots of knowledge sharing here..it has been great going through some posts...So i thought i should also start writing whatever i know..
To answer your first question: After like 20 hits your email will get blocked (20 in 1 day)
For your second question: Im not sure about that one, but if you assume that CL does sense the url you repeatedly put in just with another email address and you want to make sure your emails wont get blocked, just create several subdirectories in your domain and have them all redirect to your aff-link. Like even urls like http://redirect1.mydomain.com - http://redirect2.mydomain.com - http://redirect3.mydomain.com are all considered unique by CL system and will pass through the filters.