Per-second pricing is only honest when a job class uses the cores it pays for. On a single-threaded image conversion the c7g Houses run roughly 10 megapixels per second while a burstable t4g.micro runs seven — so the cheap House is several times cheaper per megapixel despite costing a fraction per second.
The fix is transparency first: every House benchmarks itself at boot and publishes the figure in /.well-known/crack-gate. The market page shows Hits per second, CRACK per second and measured megapixels per second side by side.
Pricing the class per megapixel instead of per cpu_second is under review.