Found that at Microsoft, too (disclaimer: that was 2 decades ago). Finding good testers at all, no matter how popular your product, is just plain hard. Standard usability testing is somewhat easier. You just put them in a box, ask them to follow some instructions and to explain their thought processes as they fumble through your brilliantly designed product, and sweat blood as they invariably do things you wouldn&#x27;t dream they&#x27;d do in a billion years. Then you pay them. A lot--I find it hard to spend less than $100&#x2F;tester here in the Seattle area.