Trailer Park Group Shutting Down Movie Trailers Division Amid Layoffs

I would be interested in learning what are the top trailer-making houses now, and which movies each has done (and any gossip about defections from one company to another and bringing what clients).

Also: are there resources to learn about the business of trailers, esp. which ones end up running, how much the theater owners charge for placement, etc. The most I could find was this article from Forbes: [https://archive.ph/9QOIv](https://archive.ph/9QOIv)

They used to be the leader in both dvd featurettes and trailers. Thats a shame