For those who don't know what I'm talking about: the capital bonus planet grants (extra) 4/0.4/0.4 credits/metal/crystal on the slow income speed setting. On the higher income speed settings, only the credits part of this bonus is multiplied by the scaling factor, while the resources part is not, e.g. on faster that same bonus is 7/0.4/0.4. Also note that normal extractors do get scaled, e.g. your quickstart howmeworld extractors yield 0.7 on faster.

The effect of this is that on the faster income settings, the players are more starved of resources (vs. credits), so aggressively wiping out enemy extractors is more rewarding.

I'm curious if this quirk was intentional design or just happened to be a bug that was never fixed. I'd appreciate if any of the old hands that played this game since its inception (or even devs) can comment...