<…> Get a copper membership instead since there are more spaces available to put your signature. It's equivalent to a member which requires 10 merits.
The signature space in size is equivalent to that of a Member rank, but the stakes for participating in a given campaign are not necessarily. I’ve just browsed through
Bounties (Altcoins) (first page) and found that the majority did not specify (*) if they accepted Copper Members and what rank they equated their signature to, a few explicitly stated that a Copper Member would be considered the same as a Member, but yet a couple more equated the Copper Member to a Jr. Member.
(*) If that is the case, ask the Bounty Manager how he will be considering a Copper Member.