My best ones came from banners. You will not get as many that way but ones get usually very good.
Good news can get millions of banner impressions for few dollars at some forums.
Best place buy them at adhitz though just make sure if promoting clixsense block clixsense or will waste alot of money. I plan to try that in new year after seeing how much I earned off person joined from banner in single month.
I rather get few good ones a day that few hundreds to thousand a day see one person from India get daily.
One day this month got 3 $2 bonuses. I starting earn way more off that than 10 cent bonus. If you focus on that you hurting yourself you should rather have cream of crop not tens of thousands where only earn from sign up bonus. In 2013 I was earning $30 a month from ClixSense than started promoting it heavy and 2 years down road earning $150-200+ a month can not wait see what earnings are next year.