A quick scan of Reddit (r/ps4homebrew) and GBAtemp reveals mixed opinions.
Overall Verdict:
A popular but unofficial source for PS4 PKG (package) game files. Useful for users with jailbroken PS4 consoles (firmware 9.00 or lower), but not legal or safe for mainstream use. https dlpsgamecom category ps4 install
For a jailbroken PS4 (firmware 5.05–9.00 or 11.00): A quick scan of Reddit (r/ps4homebrew) and GBAtemp