The DePIN sector is truly a case of survival of the fittest, with most projects already fading into obscurity. But what's really interesting are those projects quietly building in the background. Seeing projects attempt to turn communication costs into financial yield by using network revenue to subsidize usage costs is a model innovation worth paying attention to. The evolution path from the communication layer to the identity layer also holds a lot of potential. In this high-elimination-rate sector, 'still doing the work' is itself an important filter.