Also just a quick addition to my previous post. If you just simply do the math on this you'll see the conversion numbers. With the assumption stated by the OP, $2 per 100 people. $2 is the average CPA offer.
If you got 1 person out of 100 to complete an offer/ click an ad on your page.
to make $800 a month you would need 100 people ($2 an offer) out of 10,000 to complete an offer. That's per week at $200 a week. Keep the 1:100 ratio.
Gmail allows you to send 500 messages per day. (500 x 7 days a week) that's 3500 a week. You could possible get a free internet proxy and send more with different accounts.
Here is a website with all the ISP's / Webmail limits for maximum emails per day.
http://help.altrue.com/templates/Manual/details.asp?id=31606&fetch=26546
Now let's get in the real world for a second and pretend that we can actually convert people. Let's say we get 1:20 ratio on our conversions.
1 person/submit is $2, so 100 people is $200 a week. 1:20 is the same ratio as 100:2,000. If you're sending out 2,000 emails a week that's about 300 emails a day. The hard part is manually replying to all of them.
You have to remember these numbers are based on people who actually click through to go to the offer. You're converting 1:20 of those. If you want to get a full view of things let's do the whole operation at 1:20.
You get 1 out of 20 people to click thru to your offer. Only 1 of those 20 people are actually going to submit the offer. It's 1:20 and you want 100 people to submit to get $2 per offer so you have to send 2,000 emails. 1:20 = 100:2,000 but then those 100 people that show up to the CPA offer don't all submit the offer you get 5 out of 100 or 5:100 (1:20). You want 100 people so you need 1,000 people to go to the offer 5:100 / 100:1000. Now instead of 1:20 / 100:2,000 you have to have 1:20 / 1,000:20,000
At 1:20 going to the CPA offer and 1:20 actually submitting it you have to send out 20,000 emails. That's almost 3,000 emails a day.
Now do we all see how important it is to have an auto responder or to be able to put our link in the ad?
The OP is sending at least 40,000 people a month or 1300 hits a day to his adsense site ($800 a day/30 is $26 a day. $2 x 1300 hits is $26 or $2 per 100) That's a lot of posts or some really hot topics. My point being if you can't get your ads to stick or you don't have an auto responder and some gmail accounts to go with it you're not going to make $800 a month. Maybe half that. I loved that the OP shared this method but he failed to do the math behind it. I'm not a pessimist just a realist. There's more to this method then just post ads on CL with an adsense site and make $800. Or just reply back to emails with targeted CPA offers. Whatever the method, house foreclosure, things for sale, etc..If you don't have the tools to handle the volume or the skills to stick the ads you're going to have a bottle neck of too many emails or not enough visits to your MFA (made for Adsense) site.
GOOD LUCK!