Playa and all,
Tip sheets have never been worth the paper that they are printed on. Several reasons why. First of all in order to market these sheets you have to print them or get them online the day before the actual races that are being played, this is why they are no good. The day before the races you have no idea what track conditions will be, can't think of anything more important than that. Secondly, late scratches are an absolute necessity when putting forth proper analysis. Late scratches can affect pace scenarios, rendering your initial analysis futile. For example, you handicap a race and expect a three horse speed duel which will set it up for a closer, one of the three horses scratches, now you conclude that the duel might not be as hot, and that the two speeds will go around the track together.

The information that is worth paying for is clocker info an trip notes and bias notes. Many who are "weekend warriors" do not get to see wekday races or simply don't have the time or memory to keep track of biases and trips at a lot of tracks. How much is it worth to pull up information about how a track was playing on a given day? Dead rails, speed biased good rails, bad trips that don't get the comment lines in the DRF charts that they deserve, etc.
Lets take a horse like Joint Effort this past saturday, the knowledge that her last number was accomplished on a dead rail was enough to push some folks oveer the top and bet her big. WIthout that knowledge it may have been a coin toss in a lot of folks minds between her and Pletcher's horse.
Its the subtleties that aren't in the DRF that make a difference these days in playing. Most people don't have the time or put in the effort to keep such notes, and truly benefit from that type of data and information, not from selectiosn made on tip sheet 36 hours before the race.