If bot FCs are business as usual, what's the counter-explanation for the rise in bot FC generation? Normal for this time of year? An error due to the short time frame in the data set?

I suppose you might argue that it also correlates to 4.2 in general, perhaps the uptick is just a by-product of getting their product ready for the influx of new/returning players with the new content. I could certainly grant that. In fact, now that I'm considering it, may be even more likely than housing related (and may be easily verified if you could look back further at FC generation prior to previous patch releases).

But, lacking the data, I'll reserve judgement until I see if new housing rules/restrictions have changed any approaches of house flippers.