This. This is an immediate disqualification for me using a site. Maybe I'll use your app, at some point, if I find it provides some wildly more useful experience for me. But if all you are doing is hammering me to download your app on first encounter so you can 'monetize' or 'capture' me or whatever slimy marketing euphemism is in vouge this week for 'invasion of privacy', I will expend extra effort to find any alternative to your site.