I received the message with the following content :
You’ve been granted credit to use on your DigitalOcean account for $100.00. We’ve updated your balance, which you can view at https://www.digitalocean.com/billing. P...
The VPS won't be locked after 60 days.
On day 60, any remaining credit will be zeroed out and you will begin accruing a balance, which you will have to pay at the end of the month.
* You start with ...