"Alert: = You are currently using a Limited account, You cannot download nzbs or use the Api, This account will expire in 24 hours if not upgraded"

Seems like you have to pay to even keep the account live past 24 hours and have no download or API rights until then. So this is really only worth signing up for if you are looking for a paid nzb indexer. From what I can see ~13USD minimum through ~50USD for lifetime account.