Wow, thank you so much. I understand much better now!
I do have another question regarding parking domains. I just can't seem to find a website or tool that tells me how much visits a previous URL has received. Alexa Ranks is also not proving any help. Basically I'd like to park a domain that is "established" in a sense that the website's previous owner receieved a fair amount of views/clicks. Also, let's say that the URL gets 5000 views per month, how do I use that to figure out my potential earnings if I had to park that domain?