We are seeing a lot of activity in the world of advertising technology — from funding rounds to new product launches — but it’s not all good news, and inevitably consolidation is coming, too: Peer39 , an adtech provider based in New York and Israel, is getting bought by offline and online ad management and ad distribution company DG . The price: $15.5 million — roughly about half of what Peer39 had raised from investors over the course of six years.