Forum Marketing - which approach is better for cpa conversions?

Hi everyone,

I like to try out forum marketing. But like to hear the thoughts from the experiences who have been doing it.

a) Should I have a landing page instead of direct link to a cpa offer in my forum signature?

b) When people say landing page, I assume is either a blog or some website? Or do you mean a simple page redirect to the cpa offer? e.g. when someone visit www.abc.com/offer, it will auto redirect to the cpa offer website?

c) If I want to use my website as a landing page, I assume is better to have a more generic name or a pen name site, so i can have offers from different niches in there to redirect right?

e.g. Welcome to aloha.com - generic name

VS

pccomputerss.com: - more relevant to computer cpa offers, but can't promote skin care offers

d) Does it really matter whether i am going for a dofollow forum to contribute than a nofollow forum? I know this is more backlinking which is more practical to linking to my site .. e.g. List of 144 Do-Follow Forums by Niche | JR's Internet Marketing Strategies (found in google)

e) Lastly, do people actually click on links at your forum signature? I am curious. Assume you are in a video game community and you are so new say 0 posts or 5 posts (even you posts 10 post per day for 2 weeks, looks odd too) .. will people actually care or click on your signature? Coz normally I will only click on someone's signature with someone contributes very actively in the forum almost everyday and been there for awhile. Not sure how you all do it? Any advices?