This is a Site question, not a Smoke question - thread moved appropriately.
Can't help with the RSS as I don't use it, though it seem as though the RSS is at the Forum level, not the thread level.
If you Subscribe to a thread you'll get email notifications for new posts (but not comments) in that thread, which may be an alternative.
Max 2016 (SP1/EXT1)
Win7Pro x64 (SP1). i5-3570K @ 4.4GHz, 8Gb Ram, DX11.
nVidia GTX760 (2GB) (Driver 430.86).