Blockchain browser Brave is going to pay users for watching advertisements, it announced yesterday. But the company is using the word “pay” loosely.

The Brave Ads feature will have to be actively enabled by users in order to operate. Once in play, it will pop up offering users ads to watch in return for a small sum. Users will receive up to 70 percent of Brave’s relevant advertising revenue in the form of “Basic Attention Tokens,” or “BAT.”

Users will only be able to withdraw their tokens once per month. And then they will have only two applications: users can automatically donate their BAT to their most visited sites, or tip their favorite content creators. That’s probably not what users have in mind when their offered “pay” for watching ads.

Get the BREAKERMAG newsletter, a twice-weekly roundup of blockchain business and culture.

But Brave says the functionality of the tokens will be expanded. They will be usable in purchasing premium content via the browser. They will apparently integrate with TAP Network, a blockchain-based rewards network offering 250,000 brand partners including restaurants and hotels. Soon, Brave says, the BAT will even be convertible into fiat currency—but gives no time horizon for that.

The company says its mission is to reform the structure of online advertising by giving users a choice over which ads they consume and when—but they’ll need to hurry those improvements to the tokens to persuade anyone to watch them. Advertisers may also be less willing to pay to reach consumers who have the ability to switch them off. Users may get 70 percent of a dwindling pot.

Brave Ads may soon reach a much larger customer base. Smartphone maker HTC has announced Brave will be the default browser on its upcoming blockchain phone, the Exodus 1.