Treebar

The HackerNews discussion (top comments at +88) is analytical rather than hands-on usage: commenters explain the payment mechanics — Mastercard interchange fees from the merchant's acquirer flow to the card provider, funding operations and tree planting. A self-identified Stripe employee walks through the parties (card brand, issuing bank, network, merchant, acquirer); another explains TreeCard likely holds an e-money licence with a backing bank keeping user funds in custodial accounts, meaning no fractional reserve and money is safe if the company fails. Sentiment splits: supporters call the model 'very clever' and note it proves carbon offsetting is inexpensive; Ecosia (the backer, claiming 116M trees planted) has public environmentalist support for how it holds planting partners accountable. Critics call it 'essentially green washing' — a donation decoupled from the act, pure PR — and push back on individual-consumer-guilt framing versus corporate-scale pollution. The biggest practical objection is opportunity cost: US users resist surrendering credit-card rewards (one commenter flew transatlantic first class annually on points), while several European commenters say local credit rewards are negligible and consumer protections are equal, making the switch trivial. Caveat: roughly 10 of the 25 top comments come from an unrelated car-buying thread (CarWoo, RollSale, unloadyourcar.com) and contain zero TreeCard information.

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