Is there a place to see how many posts have been deleted there in the last few hours?
Brings to mind, are there any stats for spam post deletions, frequency, etc?
You can use
Modlog to monitor deleted posts/threads, nuked users etc. It doesn't directly give info on the board posts was deleted, you would have to research on it, using the available information.
Some of the virus posts have accounts originating in 2017/2018, and I’ve seen at least one that had a lot of bounty history until the virus post.
Accounts can be woken up for such activities. Could mean they were sold off or the user forgot about then and just put them to use.