Recently a bunch of my stuff has become ‘Metal Best Sellers’ on DriveThruRPG, and some of it has moved up a tier from ‘Copper’ to ‘Silver’. Truth be told ‘In the Heart of the Unknown’ is about three paid sales from going ‘Electrum’ (which would be new territory for me).
I’m a hobbyist so the raw money is not a big driver for me. I find ‘Metal Best Sellers’ status helpful as it lets me know what people like enough to give me money for, and hence helps me understand what people find most useful at the table. This helps me make new useful things.
Therefore, this is in theory my most useful stuff:
Metal Best Seller on DriveThruRPG
In the Heart of the Unknown – Procedural Hex Crawling Engine
Metal Best Seller on DriveThruRPG
In the Heart of the Sea – Procedural High Seas ‘Hex Crawl’
In the Heart of the Delve and Dangerous – Procedural Network/Dungeon Crawling
Hex Flower Cookbook – Overview & some thoughts on Hex Flower Game Engines
Carapace – Procedural Adventure

Metal Best Seller on DriveThruRPG
Combat Morale Tracker – Simple Hex Flower Engine
:: Law & (In)Justice – A Procedural Trial Hex Flower
‘Near Copper’:
:: Mythic-Style Hex Flower Chaos Emulator
:: IT Came from Below (or Above) – Hex Flower 3D Tracker
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More of my stuff on DriveThruRPG: https://www.drivethrurpg.com/browse/pub/9524/Goblin039s-Henchman