The maintenance cost of an MMO game quickly overtakes the income from the game. I suggest that the Hardware lab (that is otherwise unused except for developing consoles) gets a new recurring research topic “Upgrade and consolidate servers” which would allow the user to invest in new server hardware for the MMO games currently running. That would in turn lower the maintenance cost by say 25% or so.
This reduction would be an immediate event and the cost would then keep rising as normal, only from a lower level. You can then research the topic again to get another 25% reduction. Since it takes time to research the maintenance cost would by then be higher than it was before, so you couldn’t keep researching this topic to essentially eliminate the costs, it would just make the MMO somewhat more profitable.