OpenBazaar isn't the most user-friendly and requires users to download a program, which puts a lot of potential buyers off.
If you're looking to sell digital products for Bitcoin, I'd suggest taking a look at CoinMall:
https://www.coinmall.com. We're a web-based platform and accessible anywhere. We've also got a lot more features which OpenBazaar simply doesn't / can't have and are actively working on making the marketplace much easier to use and interact with.
We've written about 5 different reasons why CoinMall is better than OpenBazaar:
https://medium.com/@coinmallio/5-reasons-why-coinmall-is-better-than-openbazaar-f5470b59e8e2If you've got any questions about CoinMall, feel free to send me a PM!
I think that the website you're suggesting has even less items for sale than Openbazaar