I feel that one thing that effective altruists haven't sufficiently capitalized on in their marketing is just how amazingly exciting the whole thing is. There's Holden Karnofsky's post on excited alt…
Here's an extra bonus. At the moment, the core of effective altruism is formed of smart, driven, and caring people from all around the world. When you become an effective altruist and start participating, you are joining a community of some of the most interesting people on Earth.
Best of all? This isn't just some fuzzy feelgood thing where you're taking things on faith. People in the community are constantly debating these things, looking for ways to improve and to become even better at doing good.
If you spot a crucial flaw in someone else's argument, or suggest a critical improvement, it may impact the effectiveness of all the other effective altruists who are doing or thinking about doing something related.
The average person working in an ordinary job can potentially save several lives a year, just by donating a measly 10% of his income and doing literally nothing else altruistic! That would already be amazing by itself.