Perhaps it is simply incomplete information. HSBC may have reviewed Premier accounts with balances below $75,000, and decided which to sell and which to retain based on criteria that they choose not to publish. That said, I don't see a compelling case to bank at HSBC USA unless you need accounts in other countries.
I am using their Premier Relationship Savings which is 0.4%, have two credit cards (one being my first ever), and have multiple accounts so maybe I made some unpublished criteria. We’ll see.
My wife is from the Philippines so we were hoping to set up a local account there with HSBC. It would make moving money around easier (albeit not at the best rates).