I would argue that most of these aren't "good" reasons.
a) "Throwing good money after bad", see also "Sunk Cost Fallacy"
b) If the functionality the user wants is "Read the fucking article in piece without having to deal with app stores and downloads and installing and finding my article again once I've got the app installed", then the only reason your site is not functional is 'cause you're pushing the app.
c) This one is probably an acceptable reason if you don't care about the people who are driven away from your site by the stupid pop-ups, and only about the small percentage who download your app and actually start using it instead of better sites that just give you the information you need. It may make business sense, but it's still sketchy.
d) Point D is actually the biggest issue for me: I have a limited quantity mental space, and I don't want sites I don't give a fuck about to take it up. No-one but you cares about your "brand". Be good at answering my questions and I'll prefer your results in my searches. Nag me to install an app, and I'll avoid you.
a) "Throwing good money after bad", see also "Sunk Cost Fallacy"
b) If the functionality the user wants is "Read the fucking article in piece without having to deal with app stores and downloads and installing and finding my article again once I've got the app installed", then the only reason your site is not functional is 'cause you're pushing the app.
c) This one is probably an acceptable reason if you don't care about the people who are driven away from your site by the stupid pop-ups, and only about the small percentage who download your app and actually start using it instead of better sites that just give you the information you need. It may make business sense, but it's still sketchy.
d) Point D is actually the biggest issue for me: I have a limited quantity mental space, and I don't want sites I don't give a fuck about to take it up. No-one but you cares about your "brand". Be good at answering my questions and I'll prefer your results in my searches. Nag me to install an app, and I'll avoid you.