Hey Rolleiflex - Thanks so much for being a DigitalOcean customer! We would be happy to increase your Droplet limit if you get in touch. Just visit the support link from your Cloud control panel to make the request or drop me a line directly (first name @).
For what it's worth, my account has a limit of 25 and I've never requested an increase. So I guess after some period of use and payment they trust you and increase your limit automatically?
I've been a DO customer for 5 years but I'm not sure when my droplet limit was increased.
Thanks! Zach Director of Support, DigitalOcean