Call me non typically British but it's pretty obvious why they didn't ask. Even if 100% of people they asked were fine with it (Scott seems to imply he is) probably less than 10% would bother to respond, that then knackers their startup instantly. "Better to do something now and apologise later than ask for permission and not get it" as I think a saying goes.
Better attribution would have been good, and possibly reaching out to original creators asking them to opt out if they'd rather not be involved. Offering something in return (the embedded player for relevant articles) could have helped grease the wheels. Ultimately, if they get bug they may not need massive support from content creators like Scott but they do need not to be on the wrong side of them.