Hey! We haven’t quite rolled it out yet, but the idea is that it’s fixed return in sats not in time. So the time adjusts to return a % over the amount paid in sats. Like you say, you pay upfront and then the hashrate mines to you until the fpps value of the hashrate you receive reaches a set amount. It’s calculated based on the floating fpps rate per day. And you just keep mining until you’ve made back what you’ve paid + a fixed return. The % depends on duration and the amount of hashrate. We’re still working on the details.