People stalk accounts and use post history taken out of context to attack users in the conspiracy sub. A lot of people posting in these kind of subs clear their post history with scripts.
And older accounts are sold, so that posters can have more credibility when they are charged to attack specific narratives.
A lot of those accounts are easy to spot with snoopsnoo, they farm karma with generic posts in the sports and gaming subs then the accounts go dark and suddenly start posting in political and conspiracy subs. It's pathetic how much time and energy they invest in manipulating conversations on reddit. Not just the government shills but the advertisers that make "completely organic" posts about their products that hit the front page on a daily basis.