I'm quite curious to see what all the various candidates tallies are on the Liberal "supporter" front today. But, given Trudeau is an almost certain winner, his staggering tally is particularly noteworthy for future prospects. One thing is clear, the decision to introduce a supporter category has put wind in Liberal sails, an influx of energy that will be a pivotal development as we approach the next election.
Every "supporter" signed up is important for the Liberals. That said, fair to say many people have signed up to support a candidate, their ideas, their direction, rather than a more general endorsement of the Liberal Party of Canada. Particularly with a Murray campaign for instance, should she fail to win the leadership, I suspect the involvement of many ends with the process itself.
With this sort of reality in mind, the supporters of the eventual winner are the key driver, as their preference wins, chances of continued engagement are quite high. Assuming a Trudeau victory, the Liberals now have 150000 people who "support" him, as well as all the other Liberals outside of the "supporter" process. In other words, Trudeau has a ready made "red army" at his disposal, which the Liberals can then "mine" in terms of fundraising, volunteering, etc. If you've supported Trudeau for leader, there is really no reason to believe your participation ends there, the big fight will still remain.
I believe what has transpired with the new designation goes beyond any one's wildest imagination, a testament to the "star power" Trudeau brings to the process. The reality is the Liberals are now re-energized with fresh voices that will change the rank and file, presenting a formidable backdrop in terms of organization. More succinctly, guess what Ottawa, the Liberals are a force to be reckoned with!