Legitimate IPTV services have security measures. The ones targeted by OpenBullet configs are often themselves. But the accounts being stolen belong to real customers who paid $10–$20. When you use an OpenBullet config, you are directly stealing from another consumer.
(often advertised as "1,000+ channels for $10/month") resell stolen streams. These are the targets of the "config" files we discuss below.
The user opens OpenBullet, imports the IPTV config, and configures the proxy settings. The config contains: