Pathfinder 1st edition Material missing?

Very little materials/product for Pathfinder 1e exists on the Marketplace. Was it removed? What happened? 

Hi Avalon2099,  There was never much of the Pathfinder 1e content on Roll20.  By the time Roll20's Compendium was added to Roll20 Pathfinder 1e was fully mature and Pathfinder 2e was on the horizon. It probably didn't make much sense at that point for Paizo to sink money into paying someone (or Roll20) to create the Compendium.  At least they did the creatures. 

I was more referring to the 3rd party material like adventures and such, it used to be there and is no longer there from what I can tell. 

Ahhh, any particular titles you see missing?  It is possible that a publisher removed a title, or removed their titles from Roll20. Like any digital marketplace content is not forever.