But I think I am offering section is only for the premium members. I am not a premium member. And There its written that you cannot post if you are not a premium member here.

Can I start posting in that section? I think I cannot?
I don't think so. You can make posts there. Actually the offer 2 cents per post for signature is meant for only newbies, not for premium members. So try to place your offer there. Or PM quickgold about it.