Where independent salespeople purchases direct selling / MLM products for personal use, these purchases should be accounted for separately to your business costs.  In this case, independent salespeople have to clearly work out how much of the expense is private and how much is related to your business because you can’t claim a deduction for the amount related to private use.

You should seek professional advise where independent salespeople are required to purchase products on ‘auto-ship’ in order to qualify for commissions.