السلام عليكم ورحمة الله وبركاته احسن الله اليك I want to sell thing, which save time for others in shaa ALLAH. But what if them having more time leads to haram, would I be sinful for that?(waswas ALLAHU3lam) May الله reward you and your family. بارك الله فيك و جزاكم اللّٰه خيرا

Ustadh AbdulAziz al-Haqqan
No, anyone can engage in haram in his free time this not your responsibility in any way shape or form.