Ads, Update. What's happened Leadbolt?

I had a create last month last month from ads, using mainly leadbolt, and a bit of admob.  During the second half of the month I was making between 40-80$ (30-65 Euros) a day.   This was mainly from Spain using my The Penalty of Ramos or (el Penalti de ramos) joke game.

But this month (even though it started well), I have only been making between 2-6$ a day and it looks like Leadbolt don't have many advertisers anymore, sometimes there aren't even any ads available in the country (at most there is just one)
As shown here, I'm not the only one to experience this.

I have enjoyed making money with Leadbolt and they are a business with a focus on making money, they have seemed to be a respectable one.   However, as well as moving to the 'easy to learn' and multi-platform monkey programming language, I'll probably be phasing out Leadbolt ads from current and future games.

 Any suggestions for good advertising networks?