Checkout these articles:
{% embed url="https://vitalik.ca/general/2019/10/24/gitcoin.html" %}
{% embed url="https://vitalik.ca/general/2020/01/28/round4.html" %}
{% embed url="https://vitalik.ca/general/2020/04/30/round5.html" %}
{% embed url="https://vitalik.ca/general/2020/07/21/round6.html" %}