I would wonder whether it is plausible that the newspaper’s horoscope writer [= most junior journo / photocopy droid / coffee sherpa] would put in a hard few hours one week, write a dozen vague assertions of suitable length, and see them rotated over the next fortnight, on the assumption that today’s Leo will not read Wednesday’s Capricorn or the following Friday’s Scorpio.
The writer’s tedium would be leavened by opportunities to mention the planet ‘Uranus’ in interesting conjugation, or to indicate ‘a big moon rising tonight in the window’. Allusions to team colours in impending football finals would also be very apt and prescient.
If this was the case it would not be random, but predictable within the cycle, although the content of the dozen master-horoscopes would be strongly dictated by the actual effect that constellations have on humans.
Also there may be a purposeful narrative cycle of [say] - big positive, benign, benign, old acquaintance, slight bad, worse bad, slight positive, etc - that would take the caring reader on a journey over the course of a week to mask any sense of randomness.