Why are so many of the posts on /politics from [deleted] accounts?

My go-to bookmark for Digg is directly to "trending" in /politics. 4 of the top 10 posts there are from [deleted] accounts. They're generally shallow, troll posts or marketing slop so I'm not saying they shouldn't have gotten banned but when bad actors represent that much of the user-base, and their content isn't being removed, it's hard to engage this place.

I think there's a serious game theory problem happening on Digg. Everyone is engaging in a cynical "posting strategy" instead of trying to discuss or consume anyone else's content. I'm pretty sure these accounts deserved the bans they caught but it's happening at a scale that shows us that shill-posting is actually the dominant form of engagement on this platform.

I'm glad this kind of deceptive posting is leading to bans but shouldn't the content be removed too? If spammers are spamming their content, banning them but leaving their content up just encourages them to generate a new account and spam again.