Having more shares available to trade, and a lower stock price, should both tend to increase the trading volume (even more than 9x what it was before the split, in this case). That's why companies often say that they're doing a split to increase liquidity, even though it shouldn't make any difference strictly from a mathematical standpoint.
Also, a lower-priced stock is seen by many retail investors as more likely to double or triple, which can also make it more promotable.
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