With protests going on all over the country, I don't see how ANY count can be accurate. Further, there are many supporters who would never attend a protest. I am one of them. I encourage others to go, but I can participate in other ways, like actively posting on social media.
Add up the protesters, the keyboard warriors, and the many other forms of resistance, and we'll hit the 3.5% mark.
I have read books by Mark Penn and Malcolm Gladwell, which talk about that magical 3.5% as a "Tipping Point" that can kick off a trend. It's not guaranteed, but historical records indicate that it takes at least 3.5% to reach critical mass.
In America, that's about 11.5 - 12 million people.