@Gannet,
The Rewards system is working but it’s not without bugs. These bugs are constantly being addressed and fixed. Further, you may find it useful to read through our existing documentation to learn more about how the ads system works – for example:
As stated, you are not guaranteed to see any number of ads (that is, ad notifications) at any time for a variety of reasons. Further, given the variance, this will change from day, to week to month depending on many factors, most of which are outlined in the document above.
As for your NTP sponsored images – there is a limit on how many of them you can view and earn from per day, currently set to 20. Subsequent viewings of NTP sponsored images will not not earn BAT until the next day.