Credit card membership isn't allowed on the RuneScape Discussion Forums Forums for a good reason, too many people can scam, and there's no limt to Credit Cards, meaning many people will be tempted to scam others.
If you suspect any form of Credit Card Membership please contact me with proof, or report their post regardless of proof. Anyone caught doing Credit Card Membership, all users involved (expect for the reporter), will be banned for seven days, unless talked directly to a Mod or an Admin.