Mahz is currently working on adding several new features to the modkit (like a nuke button, which is essentially a ban + a mass deletion of all posts) that will allow us to clear the spam at an appreciable rate. Until that time, please compile a list of known bot accounts in a centralized location (like the Bot Reporting Thread 2.0 in the Suggestions forum). 

Additionally, I would like to remind you all that Mahz works a daytime job and can't dedicate all of his time to the Guild. It may take a few days for this problem to resolve entirely and effective countermeasures put into place.