Elon Musk’s established X posting cadence of roughly 20–30 qualifying posts per day underpins the tight contest between the 200–219 and 220–239 brackets, which together command nearly half the market-implied probability. Recent Grok 4.7 rollout activity has already lifted volume mid-week, consistent with how AI and xAI developments reliably add clusters of original posts, quotes, and reposts. Historical weekly totals cluster in the low-to-mid 200s during non-crisis periods, while the partial count through September 21 sits on pace for that range. The upcoming Starship orbital attempt remains the key swing catalyst that could push totals higher or leave them anchored near baseline if the launch timeline slips. Traders price the narrow spread between frontrunners as a reflection of steady engagement patterns rather than outlier spikes.