Joe Huffman has a great find, namely the number of Brady Campaign members, and how many have recently donated. Short answer is, it doesn’t look good for them. But go over and have a look.
Most groups don’t want their membership numbers to be public. NRA keeps the exact figure a not so closely guarded secret, but my understanding is NRA is currently running a good bit higher than 4 million members, but I guess not quite enough to claim 5 yet. Still, that’s orders of magnitude more than the Bradys claim. To compare to NRA, I would only look at the number of Brady donors who have given in the past twelve months.
UPDATE: I should also point out that it’s interesting Brady is selling their list. NRA does not sell its membership list. It’s one of the reasons we know Frank Luntz poll claiming to be polling NRA members is completely bogus. There’s no way for the pollster to know.