I'll query the database to get statistics on Duel Commander tournament entries.
Since August 2025, Duel Commander tournaments on MTGO have averaged 19.9 entries per event. The minimum tournament size was 16 entries, and the maximum reached 29 entries. Across all 63 tournaments in this period, there were 1,252 total entries.
The consistent tournament sizes reflect the regular Duel Commander Trial events on MTGO, which maintain relatively stable participation rates compared to other formats.
Sources: Data from 63 tournaments since August 2025, all from MTGO. Recent examples include Duel Commander Trial 16 events from October 12-15, 2025.
https://www.mtgo.com/decklist/duel-commander-trial-16-2025-10-1512819571
https://www.mtgo.com/decklist/duel-commander-trial-16-2025-10-1312819552
https://www.mtgo.com/decklist/duel-commander-trial-16-2025-10-1212819545