A month with a superintelligence at your hands could be quite impactful, especially if you're willing to break the law / normal operating decorum in the pursuit of protecting what you have. A superintelligence, if wielded so, could destroy your competitors in a great many ways, including the relatively-benign solution of outcompeting them, to exploiting them and tearing them apart from the inside.

A genuine superintelligence is a very, very scary thing to have under the control of one person or organisation.

If I interpret "a machine superintelligence" as "a classroom of 300IQ humans," I'm not really sure how this is true? You still have material and energy constraints, you can't think your way out of those.