I've done all that.
I'm going to save you some time with this reply (I wish someone had told me this before!)
First of all, Twitter+Clickbank=CRAP, it sucks, dont waste your time.
You can definitely make money with Twitter and CPA. However there are some downsides:
1. Most of CPA Networks dont allow twitter traffic. (theres a way to get arount this one)
2. Twitter will ban your accounts pretty quick usually. You'd be able to send maybe a couple hundred replies after your account gets banned. You MUST have all your accounts created with a unique IP address otherwise all your accounts under the same IP will get banned once one gets banned.
3. You need to use proxies. One for each account while posting your tweets.
Twitter users are usually cheap, dont expect to get any sales from them, try offers of free stuff with. First page conversion offers of Zip submit (your best choice) or email submits.
Before you start find out if your network and/offer allow twitter traffic.
If not, there are some "fake referrer" techniques around here that work pretty good.
This is based on my experience, I've tried twitter keyword targetted techniques and after many disappointments, trial and error, I managed to make some money.
I hope this helps and saves you some time
