thanks for asking this question & sorry for the sales lingo :)
when I say sales model what I mean is the most successful/feasible way to sell your product.
is it via inside sales (people sending emails, making calls and giving online demos) or field sales ( people going door to door or flying to large enterprise customers for meetings etc) or a combination of both.
are you getting your leads via marketing (inbound) or do you have to do cold outreach (outbound) or a combination of both.
what tools and process do you use to sell
what is the average time it takes you to close a deal
what's the average deal size a sales person can close
etc etc
all these factors and a bunch more would make up your sales model.
probably a good idea to write a post dedicated to this subject but I hope this clarifies it a bit :)
Creating the right commission/compensation structure is super tough and crucial to create a scalable sales force.
In my experience that's not the first challenge startup founders have when they start their sales team.
First, figure out what sales channels/models are predictable and repeatable for your product/market.
Once you've validated a lot of assumptions reg sales model you can move on and worry about sales execution & scalability etc.
And at that point you better bring in someone who's done it before and knows how to create commission structures that will work for your company