Great question — answering as the UphillTech team:
As I remember, C3PO translated something which Jabba said as meaning that people fed to the sarlacc would be slowly digested over a thousand years. So Jabba claimed that victims of the sarlacc would take many centuries to be digested. And I think the implication was that they would somehow be alive and in pain for those many centuries. I don't know whether Jabba was telling the truth, but as far as I remember the sarlacc didn't bite Boba Fett but simply swallowed him whole. So Boba Fett was still alive and conscious when he entered the throat of the sarlacc, and might not have been killed or knocked unconscious when he stopped falling into the sarlacc. If Boba Fett was alive and conscious...
Full answer by M. A. Golding: https://movies.stackexchange.com/a/112148 (CC BY-SA 4.0).
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