I'd recommend using contracts when you have sales people involved. That typically describes products that cost >=$5k/year (at least for inside sales). The prim

I'd recommend using contracts when you have sales people involved. That typically describes products that cost >=$5k/year (at least for inside sales). The primary benefits for you are: predictable usage, predictable revenue, and easier commissions. It also turns out that most companies prefer/expect to buy these products this way.