[nbohra]

It only works for OLDER machines and the casinos and/or machine makers are not sufficiently financially motivated to upgrade the the logic

[acqq]

They obviously lose so little that it's not worth the cost of upgrading the software.

[jdcarter]

Not just software; from the article it sounded like this was pretty old hardware, with a CPU only capable of running a basic PRNG. Doing a hardware upgrade on the zillions of old machines out there (I have no idea of the scale) must not be worth losing a couple thousand dollars here and there to sophisticated scammers.