Pramas said:
I was not at WotC when they released 3.5, so I can't tell you if what happened with 3.5 was intentional or not. I can tell you, as will any honest publisher working in that era, that 3.5 had a negative impact on the d20 market.
I'm just a consumer of all these products. When 3.0 came out, my group looked at the books, shook our heads and went home and played 2nd Edition. Somehow Tome & Blood didn't make us feel any more impressed than the 2nd Ed Complete Wizard Handbook did.
When 3.5 came out, we "felt" different. The WOTC books just seemed better. Cleaner, richer, fuller. Folks may hate to admit it, but the hard covers, the distribution of artwork... it somehow added up. We bit on the bait and moved away from 2nd Ed at last.
This opened the door for us to get interested in AEG, Green Ronin, Mongoose, Goodman, etc.
The thing my group has been most interested in is books (adventures, settings, etc) that make the rules we were then working to master "flex". Show me scenarios where the monsters from MM1&2, the new classes, the skill system, the feats, the new spells all work together in harmony. These we gladly buy from the other publishers.
I feel like there's a lot of material which is "hole-filler". As in - the information from WOTC is "light" on transmutation, necromancy, drow, devils, cavaliers - and to fill this single hole, an entire book pops up. My "need" was maybe 2-4 pages, but here's 100+ pages. My usual response - I'll use Google and find the 2-4 pages I need or Dragon will come along with a timely article. Once or twice, I made an impulse buy (i.e. Complete Book of Familiars) if something was top of mind while I perused through our local store and I was having trouble finding the info online. Lately I've stopped these impulse buys as the Internet is now saturated with pretty much anything I need.
I can't speak for everyone, but 3.5 is the catalyst for the modules/settings I've bought from Goodman, Necromancer, AEG, etc.