Steps to avoid getting banned on ADDMEFAST

I got a free addmefast bot here http://www.blackhatworld.com/blackh...d-viewer-auto-captcha-solver.html#post5125667

this site seems to be good liker.co.in

groundfalling said:

I use FB page likes, FB subscribers and Google circles mostly, I keep rotating my bots.

Click to expand...

Quick question:Which bots do you use, exactly?(an Imacro script or something else?)
Question #2:I am interested to know which VPS you are using. I am currently using a VPS with 2 GB of RAM, but my firefox keeps crashing due to memory usage. How do you manage to achieve leaving yours on for 12 hours? I have my custom made Imacro bot set to a 3 second + 2 Second delay; is that too short? What should I do to allow my bot to run overnight without falling out?
Thanks,
Hakim(or Jon)