In which case, allow me suggest Earned merit x Number of underscores in username.
~
What about all the jacks?
I assume I'd be second (after JackJack) but maybe I'm being too modest

@Darkstar_, o_e_i_e_o is in the lead by quite a lot there (merit wise).
@Vod, number of consanents in names times merits (just so oeieo doesn't get in on it)?
a list of earnt merit/posts would actually be quite an interesting one to calculate (but only using posts since January - or whenever the merit system came out)...