Scaling makes it relevant. In big, you get better prices for hardware and still using the same job management app.
I had the same ide to sell out performance this way just none of my ideas were viabl...
actually the inverse is true in this case, scaling makes this efficient so i can rent compute, using decentralized workers makes sense when its somewhat sporadic. but with 1h billing periods even that is somewhat mitigated. centralized systems are more efficient, specially because in this case verification is costly, i can't prove the result is garbage without running the transcription again and comparing it, which would waste a ton of resources so you have to relay on spot checks and some reputation etc and do bulk payouts that are invalidated if any of the jobs is deemed bad