dmccoy1693
Adventurer
That's what it was back when the OGL started and with the exception of some 2e and 4e timeframes, that's how it has always been. WotC started the OGL for several reasons:what I can see is that that market is basically 5e with very little lifting of other publishers.
1) Goodwill. TSR has a reputation for suing their customers that put their homemade D&D stuff on websites. WotC didn't want to have to do that so they made the OGL and told homebrewers to just add an OGL to their website and all is good.
2) Allow WotC to focus on more profitable books. Stuff like adventures are generally seen as a necessary loss (they don't sell very much, but without them, the profitable core books won't sell nearly as much). So they decided to let smaller companies sell what would be a loss for WotC but be profitable for others, all the while not have to deal with official licensing problems.
3) Start a farm team. WotC was able to hire people that already had experience with their system instead of new hires having no experience whatsoever in writing professional-level material for their system.
It was seen as a win-win, and still is. Did they need to do it, no. But they felt they could go farther with it than without it. And frankly, they were right.