Payouts happen every 24 hours. So when you get your first payout, everything resets and you start over. Currently, the total shown won't change. It will always reflect the amount you were paid out on the first 24 hours. The exception to this is if a large stakeholder (a whale) upvotes your post in the final hours of the payout, that will then delay your payout a few more hours. You can get paid on a post infinitely, it's just unlikely most post will continue receiving more than a few pennies or dollars after the initial 24 hour payout period. But you never know!