If you're investing in a software company, you need to know what you're buying. Nearly all modern day software uses Free or Open Source Software (FOSS) and its important that licenses and compliance are implemented correctly along with keeping track of copyright ownership. But as a software project grows, those tasks can get tricky. Staying legal can be a challange for most software houes.
Failing to implement FOSS code correctly can render commercial code useless as Open Source rules can apply that any adaptation of that code should also be distributed as Open Source.