Comment by rafaelcosta

Easy from your point of view... This is the argument I mostly hear from Apple folks, but my experience (especially with less tech savvy folks) is that they have no idea where or how to cancel a subscription on IAP and they think that the multiple "Apple" charges are just some iCloud thing or something along those lines. With Credit Card flows the alarm bells go off waaaay earlier: when a website asks for their CC data, they immediately scrutinize more (and thus, conversion rates are lower)