A bit of an update.
Let's start with the Carrot company. It was created in 2020.
Carrot, a platform designed for people to earn bitcoin rewards for supporting the projects and brands they love
If you trust Bitcoin Magazine, you would trust Carrot, as they are both coming from the same company:
Bitcoin Magazine and Carrot are both projects under the BTC Inc parent company. Bitcoin Magazine is a customer of Carrot, most recently when we rewarded new Bitcoin developers who made commits on Core.
The purpose of Carrot is the following:
“Carrot is our small contribution toward creating an equality of opportunity worldwide. Our mission is to spread hyperbitcoinization by letting the next billion people earn their first bitcoin.”
Basically the idea is that brands and companies create tasks and publish them somewhere. Then people can complete those tasks, and receive a carrot code when done. This code is then redeemable in the Carrot app for sats. Basically a form of micro-payment.
Once you reach to 2500 sats or more in the app, you can withdraw it to your lightning wallet. You can use any lightning wallet you want, but for very small amounts you might want to use a custodial wallet, like Wallet of Satoshi, to not pay for any fees. If you want to use a non-custodial wallet, then Muun is probably your best bet as you don't even have to care or pay for opening channels. You just receive the full amount for free(explanations about how Muun does this is off-topic). Of course you can just use your own lightning node and take care of the channels if you want to.
Now, about the courses in particular. I completed the Intro to Bitcoin course. It gives a brief introduction about how money works, and why Bitcoin is better than fiat. It has 3 sections composed of text with images, and one video per section. Each section ends with a quiz. If you answer 90% right they give you 500 sats every time, for a total of 1500 sats if you complete the course. These sats are given to your carrot account.
If you want to see another course, there's Bitcoin's Magazine's 21 Days of Bitcoin, which sends you via email 21 lessons, one every day. After that there's a quiz, and if you get it right, they give you 2100 sats in the Carrot app.
As you can imagine, it's not a way to make you rich, it's mostly designed to introduce people to Bitcoin. If you're in Bitcoin Miami 2022 you'll probably see Carrot there giving sats for free to attendees.