This move is GUARANTEED to elect Democrats to a majority. If any fringe party needs to be strengthened, it is the Greens. The Greens drive the dim candidates to the left and make the voters aware of dim "core values". The best way to insure more conservative policies by Republicans is to make our majorities LARGER so that there will be no need to enlarge the tent.
They can grow from there. They will then have a record. This is a long process , over many election cycles, not just one lucky year. It just seems they're in it for the glory of name recognition.