One of my accounts stopped serving impressions.
We tried submitting new ads and links but nothing will spend.
No impressions for 48hrs.
Anyone experience this have a fix without contacting FB?
You are probably about to get banned 
how long you were running ads ?
about 2 weeks
increase the bid and reduce the daily spend limit to what you can afford to lose(bw $10-$50)...like say, its suggesting bid is 0.30-0.70 then bid 0.71-0.75...this must work...and until account gets banned, you get traffic..this situation is not an indication of a bad omen 