Discord has raised so much money and is part of the inflated valuation unicorns that I sadly wouldn’t be surprised if they somewhat get forced into Ads
It's only a matter of time before things change with Discord monetization. On reddit there is an incentive to create LLM-powered fake accounts with high karma and sell them. It's true that on Discord this incentive doesn't exist right now because no karma equivalent is associated with Discord accounts, but eventually that's going to change as Discord, as a company, will try to monetize their user data in various ways.
It's the typical overvalued VC-backed company dilemma that needs investor returns. Quora, Medium, and so on.