That's not true, you can have as many accounts as you want, i have three on many of my test phones. The requirement is that you install the app with the purchasing account selected in Google Play Store app.
6.42/6.43/6.44: -update Benchmarks -support new hardware -bug fixes
6.41: -update Benchmarks (new tests & scoring) -support new hardware -bug fixes
6.40: -bug fixes
6.39: -update Benchmarks (new tests & scoring) -update Widgets to allow changing colors -add system monitor graphs (use Shizuku to see more details) -update TaskManager (requires Shizuku) -improve GPU info -support new hardware -bug fixes