Clear out every app and feed that no longer works.
Only 1 in 7 apps actually work. For example, if I search for a simple clock app, the system will return about 70 apps. However, only 10 of them will work. The rest will be improperly programmed or dead links. Of the 10 that remain, 8 of them will have their real estate hogged by gross advertising. So, you wind up previewing 70 apps to find a couple. Waste of time. Looks to me as if Netvibes is asleep.