I read this somewhere but can't find the source now, but it makes sense. Developers are being asked by Apple to opt-in to Family Share (b/c that looks good for Apple to have as many apps as possible available in Family Share). But, this screws developers b/c a Family can just pay once for an app, but then up to 6 people can actually use it. So, developers are going to offer apps for free but build in in-app purchases (IAPs) to get all the "features." And, as was mentioned in the Family Share post yesterday, IAPs are not covered by Family Share. So, if you want the Pro features of 1Password, for example, for all members of your Family, you're going to have to pony up the cash for each Family member separately.