Holiday read.. Product placement

After spending a week on holiday in Spain, I had the opportunity to read a good book...  The Heretic's Treasure, by Scott Mariani.
Between the beach, swimming, and other activities such as eating and sightseeing I managed to finish it.
A great read and enjoyable experience.
I was surprised at how much product placement there was.
It got me wondering...  Do writers get any support for this?
It's an interesting concept