Asking Hashem to let you win so you can help mosdos, tzedakah etc…. is asking to be zoche to be a great shaliach MItzvah.
There are lots of wonderful mitzvos. You are suggesting we ask for the zechus to be able to perform one which allows us to keep 10% of hundreds of millions of dollars, and expect Hashem to be fooled ch”v into thinking it’s l’shem shomayim?