This is one person. The only thing that changes below is how soon they say they plan to change, from "no intention" on the left to "already started" on the right.
Look at what happened at the 30-day line. Moving the person's plan by a single day flipped their "stage" from Contemplation to Preparation, a supposedly meaningful change, while the readiness bar barely twitched. That is the model's central weakness: the five stages are not real, distinct states, they are arbitrary lines drawn across a continuous variable, so crossing one is often just stepping over a line in the sand, not a transformation (Sutton, 2001; West, 2005).
Keep the useful half: readiness really does vary, and someone with "no intention" genuinely needs different handling from someone about to act. But hold the boxes lightly. Treat readiness as the smooth bar, not the five hard labels, and do not assume that matching an intervention to someone's "stage" is a proven lever, because the evidence for that is weak (West, 2005; Riemsma et al., 2003).