There are a couple of places to check:
First, you can check the Offers report (there you can narrow down by niche).
On the first chart, you can see a summary of the top 10 offers promoted on all the ads found by Spy Hero.
On the chart to the right, you get a similar chart, but that just includes the ads shown in the last 60 days.
Finally, on the bottom chart, you can see trending lines for each offer, so you know which ones are trending up or down (bear in mind that the last month is always the current month, so the info for that month will not be complete until the month is over, so an offer might have less ads right now than last month, but at the end of the month it might be trending up).
You can also check the Offers list. If you click on the column header, you can sort by that particular column. By default, it is sorted by total ads, but you can sort by Ads Running, number of landers, etc.
For each offer, you can get more info (Offer Info), plus the ads and landers promoting that particular offer.