Should marketing expenses be deducted from employee gross income?

[Jacob Zanger]

So... I work as an Acquisitions/Dispositions manager for a small team of real estate investors.  I get paid a % of every deal. So my question is should I as an independent contractor (1099) have the companies marketing expenses deducted from my checks?

Are marketing expenses deductible for the owners of the company?  If so, can I deduct my portion that I lost due to these expenses?

Also, is this normal practice?  It came as a shock to me