As the USD price of Bitcoin increases, the rewards that popular Bitcoin faucets payout decreases accordingly. Sites that would pay 50-70 satoshi per claim last year are now paying between 15-20 satoshi per claim.
If the price of Bitcoin continues to climb to $50,000 USD, the value of 1 satoshi would conceivably be higher then these faucets could afford to pay out (per climb) compared to the ad income they generate.
Any thoughts on how will these faucets deal with payouts when 1 satoshi is worth too much?
Let's be real, where there is a will there is a way and faucets have been making money for years off of this kind of stuff. If bitcoin becomes more valuable, all that does is give them incentive to change the rules, pay-outs, games, ads or whatever they're already doing to compensate for the price; I see where you're coming from "Once a Satoshi costs too much will they be unable to pay-out?," the answer is no; they're just start issuing out site-credit that breaks down Satoshi into even smaller fractions, forcing you up to at least 1-Satoshi before you can withdraw or something of that vein.
They'll start making you do multiple cycles/ads for a single Satoshi, make their ads longer, more complex, more interactive, more demanding, their entire system will tighten up, but continue business as usual. If you've ever heard of Neobux or other PTC-sites, they hand out $.0001 for some ads, and obviously they can't give you less than $0.01 other than their made up site credit.. It would be kind of like that, until enough people just got sick of it, bored or decided the faucets have tied a noose around themselves.