akismet integration for BP activity is still a bit hit and miss in my experience at least.
It does seem as if some sites are able to make it work. Since I just migrated to a dedicated server I have occasionally had to reset permissions to enable read write functions and I wonder if this might be part of the problem in some way
it works fine for me but it doesn’t catch all spam i think it’s still learning how to tell whats spam or not when it comes to activity. it’s not perfect for comments either but probably catches about 99% or so. i’d say the number with activity spam is still probably under 50% at least as far as i can tell.
I would be delighted with 50%, right now I am at 0%