Nearly four years ago, a lone bankruptcy lawyer sued Square, the payment processor run by Twitter CEO Jack Dorsey, challenging the app’s terms of use—despite never signing up. As of yesterday, the case will proceed, thanks to an opinion issued by the California Supreme Court that could have wide-reaching implications for online businesses.

The first thing you need to know is that, for whatever reason, Square’s Prohibited Goods and Services policies include “bankruptcy attorneys or collection agencies,” which you’ll recall is plaintiff Robert White’s line of work. California, where this case was tried and where a plurality of online services are headquartered, is also home to a state law—the Unruh Civil Rights Act—which provides broad protections against discrimination of many kinds, including occupation. But the question remained as to whether White needed to have entered into an agreement with Square (by agreeing to the terms of service) in order to have experienced said discrimination barring his “full and equal access” to the service.

For the time being at least: no.

“In general, a person suffers discrimination under the Act when the person presents himself or herself to a business with an intent to use its services but encounters an exclusionary policy or practice that prevents him or her from using those services,” Justice Goodwin Liu wrote in court’s unanimous opinion. “We conclude that this rule applies to online businesses and that visiting a website with intent to use its services is, for purposes of standing, equivalent to presenting oneself for services at a brick-and-mortar store.”  […]