What percentage of Twitter traffic comes from reddit?
What percentage of reddit subs (weigted by membership?) have banned that type of link?
The question being, will this reddit ban of that other social media site make even a small dent in their traffic?
> What percentage of Twitter traffic comes from reddit?
You're going to need Twitter to tell you that. Seeing as Twitter doesn't even share active user statistics anymore, this is a stretch.
> What percentage of reddit subs (weigted by membership?) have banned that type of link?
This would be a fun data collection project. You could even look at the number of links to Twitter that were made before and after the bans.