As a Buyers agent yes! The question of who pays commission is addressed in the Buyrs Agency Agreement. If the buyer wants a FSBO and the FSBO will not pay the commission them the Buyer would in many cases be providing compensation.
As work working with For Sale By Owner Sellers - Yes! I offer assistance which is limited. Selling Real Estate may look very easy to many property owners. However, once they get started they begin to understand real quick how much work goes into the marketing of their property. And because they do not do it very often they quickly become overwhelmed. So, I offer some limited help upfront and attempt to establish a relationship that could blossom down the road. I tell them this up front too.