According to the payout terms.[0] It appears this service is making money though some sort of store front on pling.com. They are hoping you use Open Desktop to

According to the payout terms.[0] It appears this service is making money though some sort of store front on pling.com. They are hoping you use Open Desktop to contribute to their store. Looking through the store, it feels a-bit like Patreon. [0] https://www.opendesktop.org/terms/payout https://www.opendesktop.org/terms/payout