I was about to write this as a reply to Internet-first government policy - #2 by alberto a couple of days ago but thought it would be too irrelevant and off-topic regarding the questions. Now @noemi s post pops up with e-democracy again and this time I will blantly be somewhat hijacking off-topic.
I am sorry not to answer these questions, but I wondered the same about two other projects:
In RailsConf 2019 Lightning talks, Raimond Garcia spoke about consul .
Both consul (link to source code on github) and decidim (link to code on github) are participatory democracy web applications written in Ruby on Rails and apparently in production in quite a number of muncipalities. That might not be the revolution of the system - the actors and roles stay more or less the same.
In what I understand though, in contrast to the aforementioned tools, CitizenLab is not Open Source, meaning decision and information processes would be lead by venture capitalized “secret” non-verifiable algorithms where neither user-groups are the product owners. I know very few about the company and do not want to deny them great visions, values, craftsmenship whatsoever. But public money, public code! Besides, from a business perspective I do not think that Open Sourcing the technology (and still doing the consultations, hosting, development) would be a great risk.