I have experienced revenue erosion at DS for about 6 months. I expect to have lower revenue during the summer months, as there are fewer people in front of their computers and for fewer hours. However, my weak results had caused me some concern.
However, I have some Great News on this front. DS has started a beta test of a significant improvement in their optimization system. I only have results from Friday and Saturday so far, as their stats reporting is delayed from Sunday and today. My preliminary results for my portfolio looks like a 30% increase in RPM. They had told me to expect around 10%, but they tend to understate these things until they have some hard data with a lot of portfolios. Inevitably, when they make an improvement, it does not affect all portfolios the same. They are not doing the beta test on all portfolios, but once they have the bugs worked and hard data on improvements, they usually spread the improvements to all portfolios.