Yeah once you reach to full member then you can expect higher earnings from signature campaign and if you want to make it quick then you can also buy full member account directly.
Buying a full member account can be dangerous as you do not know how the account is used previously and what are the quality of the posts. I think we should start from the Newbie account and develop it.
It is true. Sometimes it the account is tagged with bought account and trust rating is compromised. I agree to creat your own account and develop it, that way you will grow as the rank of newbie is upgraded. Anyway you can also join the campaign if you are newbie. Some campaign also accept newbie since I think the rank service fee is very cheap. And never gamble your earning no matter how small it is.