4. How can I post an ad to all the US states and/or Canada provinces with just one click?
On the Post page there are 2 options: "Local ad" and "Wide area ad".
The first option allows publishing regular ads, where the poster state/province, city and postal code are required fields.
The second option allows choosing where you want your ad to be seen: "All of US", "All of Canada", or any combination of states and provinces.
Please note that the viewers can exclude the non-local ads from their search results (see the checkbox "Local ads only" on the Home page).
5. Why don't you ask for email addresses ?
Why should we ? There's nothing we'd really need your email address for. You are probably aware that Internet marketers buy email addresses, and that spam accounts for a huge (and growing) percentage of the e-mail traffic. Rest assured that you can't possibly ever get spam from us.