I think the same as Kate... Hmmm... the reason they need the 50 posts is because they want members who are committed to the JM community and are here to stay, not just drop by to get a siggy and then leave. So that's why she can't request an FFA since no maker would want to design a siggy that won't be used, kwim? But since you know her, it's kinda up to you whether you wanna make it or not, since you are the one spending the time on it, etc.
But I dunno for sure.