It can't, and I wouldn't hold my breath for such a small company being able to navigate compliance for contactless payments. The Pebble does use standard watch straps though, so you could get one of the ones with a programmable payment chip embedded inside.

If that's all you use your smartwatch for, you may as well skip the watch and get a payment bracelet or ring though.

e.g. https://www.curve.com/wearables/

I used to use Curve but they became really unreliable, especially when paying for public transport, so I just switched back to a normal card.

Shame because you can get some nice watch straps with curve integration, which would neatly solve the missing payment feature on Pebble watches.

Except not in the USA. To bad the rings looks nice.