Why have subscriptions (i.e., recurring payments) not taken off in web3?

Co-Founder at sablier.com, and open-source developer. I have a broad range of interests, including longevity, epistemology, physics, and psychology.

probably because it's a bit more complex to implement vs a single-shot payment.
i.e.
USDC.approve (what's a good considerable value, monthly payment * 12?);
then a service must trigger transferFrom from an address(es).

not that complex but I think it's much rather more mental then a technical limitation.

23. Co-founder of @beliefs (beliefs.social). Collaborator at /frogfm.

Yes! Sounds as a viable tradeoff for max approval!

You actually can max approve the contract if the contract keeps tracks of timestamps and allows withdrawals only up to `(currentTime - lastTime) / 1 month in seconds`.