Don't know if this has happened to anyone else, but as of 1st.Jan and today, Facebook has suddenly and drastically increased the ad. impressions (and therefore clicks) from our campaigns and billed us automatically up to our daily budget.

The CTR is more or less the same, they've just given about 10x impressions out of the blue.

Previously running at a very low level.
Watch your budgets !

Don't know what they're up to.