Benefits available to Debian Developers and Debian Maintainers are documented in the Developers Reference:

https://www.debian.org/doc/manuals/developers-reference/resources.html#developer-misc

In addition:

Certificates

DDs may obtain certification of their membership (586186).

Gandi

Gandi provides website hosting, cloud computing, domain registration and X.509 certificate services. Gandi provides discounts to the open source community.

DDs should send an email to non-profit@gandi.net from your @debian.org address indicating your Gandi handle. Please set your handle's prepaid account currency as this will expedite provisioning. Gandi will apply discount level 'E' (751489).

LWN

LWN aims to be the premier news and information source for the free software community. HP sponsors subscriptions to the open source community.

DDs and DMs should send a GPG-signed email to lwn-subscription@debian.org indicating your LWN username. Patiently wait while process unfolds (581603).

Steam

Steam offers subscriptions to select titles to the open source community. Collabora coordinates the dissemination of keys to the open source community.

DDs and DMs should send GPG-signed email to steam-key-request@collabora.com requesting a key (736381).