Going to turn 74 took a while, so I took a shower. When I came back it had completed :
4.1m/3.1m/59.5/6.5/370/45/637/291.3/2019/239/0
Increase 100k score, no significant change in resources, tech, int, tech levels.
10 more systems and 92 more colonies planted. Population jumped another 20.4 BILLION. 450 units produced, presumably mines. And ships INCREASED another 25 despite planting 92 colonies...

I will post again at turn 75 on a new thread Monster AI. Discussion of the implications of this AI should occur there.