The reports are free but you pay for monthly credit monortoring, atleast that is the spin they put on it.
OP the only real score is your FICO score. All other scores you see advertised are absolutely useless and mean absolutely nothing. You can find 20% off coupons on the net with a simple google search.
Keep in mind most industries have specialized formulas that produce scores you cannot get, i.e. car industry, insurance, utilities. Even deeper than that individual companies have their own internal formula's. In short your FICO tell's you less than you may think, but is still good to know before trying to get financing for a big purchase. Keep in mind it is always best to just have a clean report and go from there with the score.