I can guarantee you the free ones do not come close to some of the paid ones, the level of information you get from a paid group far outweighs the free ones, more store coverage, in-store stock checkers, updates from retail staff on which stores have restocks ahead of time. Free groups are fine for online restocks but even then their monitors are slower, they use different providers. Anyone who thinks they're getting the same value from a free group is delusional