I doubt Intex have much if any interest in Sailfish. However they lack the resources to develop their own Android app store and make a success of it (and get revenue from it), but they can get revenue sharing from Sailfish / Jolla store and Aptoide through Sailfish. Also since there will be a relative paucity of apps, they can much more easily promote any potential moneyspinners of their own. It's worth trying for a relatively small player like them, even if their main business will continue to be Android (& FireFox). They might not sell that many, but they could potentially have higher revenue / margins per sale.

Indeed, the page on their website about Sailfish and their forthcoming "Aqua Fish" handset(s) shows more screengrabs from Android and iOS than it does Sailfish.