It depends on ur SP and since I delegated most of mine away so I only have about 100 SP left. With that I lose more than 2.5% rc per comment. That doesn't sound like much but if i do 10 comments in a day then it adds up really quick. Smaller accounts have problems after a few days of being active so I think that is killing a lot of comments and activity. If they have fixed anything i haven't noticed.