You have to be level 2 to do the Red Cent thing. And you can buy Level 2 with 50 Red Cents or real $$$ in the Red Cent shop'
The level 2 also gives you the ability to give others Red Cents for good or helpful or funny posts. It does not cost you any to give and in giving them out it will also earn you more. If you make posts that others find funny, helpful, good question etc then they will give you Reds and that is 10 each time. So it is a good thing to come here and post now and then.
By passing out and earning these "red Cents" you can use them to keep up your free level 2 each month.
I just gave you 1 Red Cent and I am sure others will also and someone may even give you a free level 2 for a month. As soon as you have 50 RC then go to the shop and get your level 2!!