Solus, sounds like you are both kitchenware that does not reflect light and assigning labels as such.
Any lawsuit filed like this that may serve to bring to heel (render more reasonable) the NFA, or remove it altogether benefits most all firearms owners. If you don't have a use for a safety device (suppressor), short barreled long guns (home defense, mobile defense during civil unrest) or automatic weapons (ultimate dethrone the tyrant fire suppression for a "well regulated militia") then by all means, send the money to Bloomberg instead.
In most every case that someone has legal standing to file the suit, they probably are like the rest of us and don't have the money to push it let alone all the way to the Supreme Court. Likewise as I learned from my civil action, attorneys often don't have the means to even get to trial either on their own. Thus, a solicitation to interested parties to help with the case. Does that mean the lawyer is going to make money running his business - certainly. If he didn't he wouldn't be in business long to continue the case let alone any others he has, and in fact it may allow him to lighten that load to concentrate on the one at hand.
Can it be just a jerk around to get money to fund continuing income, maybe. But given the misstep by the BATFE under Obama with the NFA and trusts, its not like someone just came out of the blue asserting this looking for funds. They have a real shot at getting somewhere with it given that tax stamps were actually issued for automatic weapons, then illegally seized. Holder & the BATFE created the hole, thinking to close the NFA off further from the public, but in fact when they made the move they created a bigger one. To not exploit it would be stupid beyond measure.
What I'd really like to know is why NRA, RMGO, GOA, NAGR, SAF etc aren't on board helping. Especially the NRA, since I am a life member and the NRA's president in 1934 helped created this mess (NFA) I'd like to see them correct that mistake. Maybe they thought they had good purpose with it at the time, but its been misused to disarm the population of the primary arms that would be most pertinent under the main purpose of the 2nd Amendment.
That is something that even if you don't want to donate, I'd hope you would support. If you don't, I'd have to question who's side you are really on - the nanny staters or the side of the Constitution.