I suspect that some of the main subreddits - funny, aww, and pics, for example - could be populated entirely by bots and a lot of people would still browse through them. If you're just idling through looking for a little dopamine, then r/aww and r/pics are kind of like instagram or tiktok. From Reddit's perspective, those are the important subs, where the smaller ones where you can find good discussion and insightful answers don't get enough views to serve enough ads to affect their bottom line.

Wow, I didn’t realize the Reddit to Digg migration was so drawn out. Do we know how big the initial migration to Reddit actually was in terms of user count? It seems like Lemmy/Kbin are seeded with a few tens of thousands of users, and I wonder how it compares.

The main migration was actually in 2010 after the v4 redesign. Digg wasn't dying in 2007-2009, it was one of the hottest websites on the internet.

Reddit's actual daily users only equates to about half that number. While an interesting metric, Google search rates don't equate to users. Heck, my searching for that information contributed to that and I didn't click through to Reddit once.

Not if the redditors that leave are the ones that do the majority of the moderating and quality posting. If the quality goes way down, people will look elsewhere. Also, I have a feeling we'll see a much bigger migration once the third party apps all die on the 30th.