Prediction: Robinhood might integrate Lighter's perp engine in the future, so they won't have to build from scratch; meanwhile, Lighter could benefit from Robinhood's 24 million users. For example, Robinhood could act as a liquidity provider for Lighter, offering tokenized stock liquidity. Of course, Robinhood would likely prefer to build its own ecosystem, so any collaboration between the two might eventually focus on tech sharing or liquidity bridging.