I suggest you rename your Prop24 to something like PPLTS (pay per last time shares)
Prop is the name of the payout system that no one should ever use, since it's easily gamed such that long term miners lose rewards to hoppers.
... and your thread title says 'Prop' also ... i.e. all in all a BAD name for a payout system basing the name on Prop.
... as for your new payout system ... it probably still can be gamed since it's based on time.
Thank you for your comment,
kano.
Yup, you're right there - a lot of longterm bitcoin miners are losing their reward because of pool hoppers, unfortunately.
That "Prop24" - it's a temporal measure, we're working on implementing a new payment system to our pool right now.