by MunchWolf
This is an untested strategy, but something I've pondered.It is normal for me to abandon systems (either through influence or bankruptcy) that only supply 1 usuable planet (this is not the strategy, this is common practice).
Later thought I might want to reclaim that system, either because it has a second usable planet (due to tech purchase) or it has VPs I want, or maybe I don't want anyone sneaking through and taking that system.
In those cases, drop a starbase on it (or intercepter), remove your influence token (however you do), and then at the end of a combat phase when you want that system back (maybe turn 9 and are looking for VP), reclaim it for free.