If the trial version of a game, the trailer of the movie, holidaying in an exotic location is a sample; its not the same as playing the full version of the game, watching the entire movie or living permanently in that exotic location. The motivation for a trial could be different from the real thing. The trial could be optimized or manipulated for selling it to an audience. It helps to have an approximate scaling factor to scale the sample correctly to the real thing. Be aware about the difference between investing in a trial and the real thing.