When Amazon first introduced its Dash buttons back in March 2015, they were considered a bit of a novelty gimmick that few people would want to buy. But last month the company added 50 new brands to the program, bringing the total over 160, and right now there’s a major incentive to try them out: Amazon is paying you to buy one.

The buttons normally cost $4.99, and you get $4.99 in Amazon credit after you use one for the first time. Now, the buttons are available for only 99 cents but the credit offer still applies, so you’ll make $4 each time you purchase and press a Dash.

For those who don’t know, the small gadgets allow people to create an order for a specific Amazon product just by pushing the button. The range of items available covers common household goods such as toilet paper and coffee pods right through to condoms and even Play-Doh.

The Dash buttons are available exclusively to Prime members. The deal is part of today’s Amazon Prime Day, which features more than 100,000 discounts for members of its $99 per year/$10.00 per month program.

Last year’s inaugural Prime Day may have been a success for the company, but it wasn’t the Black Friday or Cyber Monday rival that was promised. Most of the discounted products weren’t exactly essential buys, and the best items sold out very quickly.

Amazon has assured people that Prime Day 2016 will be different, with increased stock and a wider range of reduced items available. It appears that the company has kept its word; there are more high-end electrical items on sale and fewer beard trimmers and Tupperware boxes.

If you’re not a Prime member but would like to take advantage of the deals, you can always sign up for the 30-day free trial.