About DigitalOcean's recommendation

DigitalOcean often uses coupon codes to give away US dollars, and these US dollars can be used to directly purchase VPS, which is quite practical.
DigitalOcean recommendation, I guess many people are using it. I just received a $10 recommendation, and then studied the recommendation rules. The most important thing is:
1. The referral party must have consumption
2. Minimum spending: $10
3. Give the referral the same amount as the consumption
DigitalOcean official website: https://www.digitalocean.com