Ownership of CatCo and her millions of dollars isn’t the only way Lena became more dangerous in “Trigger.”
Admittedly, the woman herself doesn’t know that she has superpowers at the moment, and she hasn’t undergone the transformation that will presumably take her from single mom Sam to supervillain Reign.
Lena could have a superpowered ally firmly in her corner if she does turn on Kara.
Still, she has already shown that she’s grateful to Lena for the opportunity and–more importantly–the money.