Nerdwallet has a pretty good comparison chart for secured business credit cards. You'll find many of them with cash back rewards, but I haven't seen any with flight rewards though. You can also build business credit with regular credit-that-works-like-debit cards from Brex, Dappr, and several others. Source: about 1 year ago

What really makes the Celo protocol stand out is its ability to solve two fundamental barriers to using crypto as a means of payment: ease of use and purchasing power volatility. The mobile-first Valora wallet built on Celo is a social payment application-oriented around overcoming these exact barriers through phone number verification and stable-value assets. Crypto addresses are linked to using mobile phone... Source: over 2 years ago

The initial training, conducted by local partner, NairoBits, provided participants with guidance on cryptocurrency and cUSD transactions, how to complete microwork tasks, and how to cash out earnings to M-Pesa. After that phase, all 200 Kenyan participants went on to complete digital microwork tasks provided by Appen via the Toca app (now Corsali). Within a few seconds of completing their tasks in Corsali,... Source: over 2 years ago

All you have to do is download the Valora app, a Celo wallet, and fund it by buying cUSD or cEUR, which you can do from the app directly. Source: over 2 years ago

You can get 50% APY on cUSD (USD stablecoin on celo) or cEUR (EUR stablecoin on celo) using the Valora wallet on the Celo blockchain. Can learn more on the blog. Source: over 2 years ago

Gift them Celo using Valora. You can send them money even if they don’t have a wallet yet by sending it to their phone number. Source: over 2 years ago