It depends very much on the app or site. In the case of apps for mobile, I usually cash out as soon as possible, less than a payment being under 50 cents (this because my paypal is business and may ban my account if the amount is lower than 50 cents). This because it's hard to reach the minimum threshold into mobile apps and the long waiting is tyring. So I don't go above the minimum payout (it's different with the apps that pay cryptocurrencies, at least the ones I use as they pay weekly or each 3 days: sometimes I wait a little more to earn a larger number of cryptocurrencies).
About my survey panel: I cash out as as I reach 1 dollar, the minimum payout, because I don't want to wait for long periods to accumulate higher thresholds. But in the past, when I was dedicating much more time to survey panels, I waited.
About ptws: all depends on the conditions of each site: if waiting higher thresholds means points get much value, I wait. Otherwise, I cash out as I reach a little more than the minimum. If a platform pays cryptocurrencies, I sometimes wait for larger amounts, especially in the case of an altcoin I need to exchange to an established cryptocurrency, as I would have to pay fees to then withdraw to a realible wallet.