That's interesting. I thought - from the tone of this thread - that it was more than that. WotC does exactly the same thing:
Not exactly.
This is what Paizo has done in the past month:
Rite Publishing Roundup,
Super Genius Roundup,
A print book from Skortched Urf' Studios/Mongoose,
Another Rite Publishing roundup.
Granted, these all link to the Paizo store so they are selling these items so they are making money from it. But I have to tell you, the quantity of exposure this gets translates into ALOT of sales. As in, products of mine that don't make it into Paizo's blog sell 2:1 better at DriveThruRPG while those that make it into the blog sell 2:1 better at Paizo, with roughly a consistent number of gross sales a DriveThru in both cases.
Then there's email. I've sent emails to James Jacobs, Vic Wertz and Jason Bulmahn about products of mine and they answer them. They have been very helpful. Thats on top of the emails I send Jeff Alvarez, Ross Byers and plenty others about technical issues and other non-game related issues who are exceptionally helpful.
A prime example of one such email concerned my best selling series:
Book of the River Nation. The series takes the rules of the Kingmaker exploration, kingdom building and mass combat rules and reprints them for players so they do not have to buy the adventure to get the rules they are going to be using. About a month before the first installment launched, I sent Vic an email asking if Paizo had any issues with me doing so. I made sure to state that I took out all of Paizo's product identity and that if Paizo was uncomfortable with what I was thinking of doing, I would be willing to scrap the whole project. After reviewing the project, Vic emailed me back saying that Paizo had no problem with what I was doing.
I don't believe any of 3rd party 4E publisher has had similar contact with Wizards. It was very nice knowing in advance that Paizo was perfectly ok with what I was doing before launching, riding so close to their IP.
EDIT: Dang, I told myself that I was not going to participate in this tread anymore.