TL;DR: Reddit is removing the option to opt out of ad personalization, targeting ads based on user activity. Some specific ad categories can still be limited, but there’s no more opt-out option.
Reddit was unique - at least in my experience - in that it expanded my horizons and allowed me to grow in many ways.
Before Reddit I just searched out sites / forums about my interests.
Reddit allowed me to organically gain new interests through daily interactions.
I’ve left it since they killed Apollo but I will admit that there were various good communities that I do miss!