Do reading access and credits fluctuate if I don't login or visit for some period of time? Sometimes I see my credits go down and sometimes go up. Anything wrong with this? Acctually, I'm working hard to gain and become some sort of privileged member. Many thanks!

There will be nothing changes if you are offline for some time.Those credits won't go up or down by itself,it may cause by you are replying thread unapproprite or not following forum rules,then your credits will get deducted.Whereas if you have done something beneficial to the forum,you will get some credits.So bottomline,whatever you do in this forum will affect your credits.Just follow the forum rules then you will be fine.

Many thanks, though I've never break the rules. Still being deducted.

Are you sure?When you got deducted credits,you will received message that your credits were deducted and what reason you were punished.From there,you will know why you are being penalized.