Twitter offers a more automated means of lead capture. With a target web site, either your own or the ‘offer’ money site, you are in a position to write short articles or blogs and then post Tweets carrying links to these articles. Keep those down to about 10% of the total, linking the other 90% to interesting on-topic snippets elsewhere on the web. Then use a good scheduler to queue a week or two’s Tweets and then let it run on auto pilot.
As a last resort, you could try cold calling by phone. This is probably the most depressing and soul destroying activity on the planet. Even if you get past the usual questions such as ‘If you’re selling something – I’m not interested’ and ‘How did you get my number?’ you need a really slick and professional script and the ability to recognize and avoid lonely old ladies who just want to interact with someone, anyone, in fact.