The 911TAP petition has been presented in December 2016 as a key project for them. They are collecting signatures via street action (chatting up people with paper forms on a clip board) as well as online, with the street action yielding more signatures!
When they started, they announced specific targets: 1 million signatures in 4 years, but the most important goal of all was an milestone count of 32,000 signatures by the end of 2017.
In July, they published a quartely update report on the project, and it sounded like they were having great success coming from wonderfully determined and effective activists pushing each other to more success by friendly competition between cities.
I commented that on report on their Facebook site, explaining that, in project management, the main, if not sole, purpose of a progress reports is to monitor if the project is on course towards reaching its goals in time and on budget, and pointing out that, at under 2,000 after half a year, they were on course to spectacularly fail what they had presented as their most important goal - the 32,000 by year's end. Surprisingly, I got a reply, Bill Jacoby (a lawyer who has been with AE911Truth for years) asked me if I could volunteer my project management skills to improve performance

I kindly declined, explaining that I am a critic, not a fan.
Never heard back again. And TAP911 has gone on ignoring their goals and forgetting to tell their followers that they are failing every damned day.
They average a trickle of about 2 signatures per day from the online form, and occasionally someone plugs in results from their paper forms, which generate perhaps 100 signatures per month. They'll not even get 3,000 by Dec 31st, and the idea that this project will creaty a "
groundswell of support and activism" that generates
millions of activists is best described as madness.
In 2013, AE911Truth announced, with great fanfare, and to the tune of hundreds of thousands of US$ spent on advertising, their "historic", "umprecedented" "ReThink 9/11" campaign. The website still exists:
http://rethink911.org/
It has its own petition, started on September 02, 2013, result prominently displayed on the start page, just scroll down one window.
By the end of 9/11/2013 (within a good week), they had 10,000 signatures! By the end of 2013, about 16,000. Sounds like a lot, and indeed, further down on the front page, they still today state this optimistic goal:
External Quote:
When this petition reaches one million signers, it will be delivered to the Head of State of every nation that lost citizens in the attacks of September 11, 2001.
Hahaha o LOL my dear!
10,000 signatures in a week - that would give them 1 million in 2 years.
But 16,000 at year's end? That was an average of under 1000/week, and it would take 20 years at that pace!
In 2014, they averaged 72/week (265 years to go)
In 2015, they averaged 34/week (560 years to go)
In 2016, they averaged 18/week (1080 years to go)
In 2017, they are so far averaging 15/week (1260 years to go)

Inexplicably, they keep the page and the petition up, and link to it from the AE911Truth homepage, as a permanent documentation of their utter irrelevance. The count, now at 23,267, asymptotically approaches the ca. 25,000 signatures of the original AE911Truth petition (after more than 10 years!). This seems to be the full extent of Truthers you can reach in the world and motivate to do a minimum activity - fill out a form, 1 minute of effort.