Surveillance capitalism follows the same rules as capitalism; do whatever is most profitable. The deception/manipulation/propaganda algos are 10-1000x more valuable when they're able to target you as an individual; across all accounts, space, and time. The users hardest to swindle, who already gave a shit about privacy/anonymity, have already left.

Most advertising on reddit is guerrilla marketing, and reddit either runs their own bots or explicitly enables them to inflate activity and engagement.