Basically they're preparing for the endgame here where the police blackout cellphones over Ottawa, move into box the protestors, throw tear gas, make mass arrests, and send the freedom convoyers off to processing centers. They're calling on everyone everywhere to head to Ottawa to bolster their numbers.

Reading between the lines, they've said they have active members of the police force on their side and I think they got intel that the end is coming. Gonna be interesting.