This was true before Twitter decided to inject tweets from people you don't follow into your timeline.
altruistic view : if you fix their service on your end, it invalidates portions of their feature A/B test -- a weaker signal means that it'll be less likely that they remove whatever feature offended you / made the service worse.
pessimistic view : they won't stop being abusive to the user until the abuse shows up on their financial reports. Stop being a patron, they'll be forced to change their ways.