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.
Some of us remember there was a time when things like Reddit didn’t exist, and neither did Facebook, Twitter etc. Lots of people lived just fine without them then. It’s completely possible to take a hard line on this stuff and just refuse to use sites/apps/products that don’t respect your privacy. Remember, there’s always a smaller, friendlier or mechanical version.
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!