Reddit

Sort of. Digg’s implosion was much more immediate, the changes directly impacted normal users so it was easier to mobilise people, and at the time Reddit was a bit more mature and easier to understand than Lemmy/etc is now.

My guess is we’ll see much more of a Digg-like exodus once Apollo stops working and the average user sees an impact.

Yes, although Reddit was more mature by then and had some communities already.

Digg tried to make money off it's communities ASAP and killed it. Reddit tried the slow burn: build up users for 15 years and then pull the rug. It's hard making money from a site that has all it's users do the work. The only value reddit has is automated infra, which in the days of auto scaling k8s clusters is not that unique.