If you have a modified console (CFW or HEN), you can still install the Spotify package, though it will likely not connect to Spotify's servers for direct streaming.

No jailbreak needed

A is a package format used by the PlayStation 3 to install applications, games, and updates. In the homebrew community, a "Spotify PKG" refers to a standalone installer that allows users with Custom Firmware (CFW) or PS3HEN to manually install the app without needing the PlayStation Store. How to Install Spotify via PKG (For Modded Consoles)

: Format a USB flash drive to FAT32 (the PS3 cannot read NTFS or exFAT for standard package installation). Installation Guide

A custom-made homebrew application that essentially points the PS3’s browser to a simplified web player. Why Enthusiasts Still Use It

There is no widely stable homebrew "fix" to restore Spotify functionality on PS3. Most users in the modding community have shifted to using the PS3's internal media player for local files instead. Alternatives for Music on PS3