That's weird. I remember the great SMB cleavering, where they spiked anyone that was, say, a small brick & mortar, preferring to focus on firms that were more pure tech and higher average balances. I've banked with Brex for, I don't know, 5 or 6 years now, and somehow dodged that, but it was concerning at the time since migrating operating accounts is an enormous pain in my ass.
This was made a bit more annoying when they lost their magical single operating cash sweep account and forced you to split to a separate Treasury account in order to earn interest. Even with auto balance shifting rules, I've had a few transactions fail because of bad timing. (And ACH is scheduled at the same time an intra-bank transfer is scheduled, but the ACH processes overnight and intra-bank has to wait until market open.) Super obnoxious.