Thanks for the reply, but I've already connected My Shazam to the premium Spotify account.
I could see if it only happened now and then for it to be a geographic limitation, but the grayed out situation happens about 90% of the time and we are talking about US based artists and I'm in the US as well.
Same exact thing is happening to me, too. It just started within the past couple of weeks. Spotify still displays but is grayed out for ever song that I’ve Shazam’d. My integration is fine - new Shazams automatically hit my Shazam Spotify list, so the connection works. I’ve tried disconnecting and reconnecting Shazam, uninstalling & reinstalling Shazam and Spotify but nothing works. And the issue occurs on both my iPhone X and iPad Pro (both running the latest version of IOS)
I think it may be related to the search done for the song ie Shazam can’t find a unique result. I’ve found that if I click the Spotify button next to the ones where the Add To isn’t greyed out, then it opens Spotify directly at the song whereas when I do it when the button is grey then it opens a search screen with many duplicate results.
What's odd is that I had someone in my office shazam a song at the same time I was doing it. He was able to add it to a Spotify playlist directly from the result screen whereas I couldn't. I then attempted the same song w/ my iPad and that didn't work. Tried if from my Apple Watch then opened my Shazams on my iPhone (after it sync'd) and was then able to add it to a Spotify playlist. Really weird.