That's not "analytics"; that's order internalization, something almost every retail brokerage does†, both because they get paid to do it and because it improves outcomes for their customers.

† You could argue either way about whether IB gets paid to "internalize" orders or whether the order flow rebates they get are something else.

This article implies for example that on a $10,000 trade that Robinhood would be compensated $0.80 (0.00008 per $1 of trade). That seems pretty modest.