Said I'd never have any more rigged or dodgy thoughts (which I will stick to) There is however with Extra Chilli, something I can't quite put my finger on, totally agree most bonuses are VERY poor.
I think the first mistake we all make is comparing it to Bonanza, graphically very similar but I can only assume the math is VERY different. You can even tell the way the reels arrange and regularly block any chance of a decent hit.
I'd err at ultra, ultra high Variance maybe?
FWIW, My PC setup would not have survived those returns you posted