Lifthrasil: But don't in-app purchases require some form of DRM? They have to be locked to an account after all. So even if the data-mining is not DRM, they will need some form of DRM on the game for the in-app purchases.
mqstout: Not necessarily. The Sims 3 had DRM-free in-app purchases. The decorations you didn't own could (optionally) be allowed to show in the decoration menues and allow you to buy them in-app and install them immediately (if you were logged in to your EA account in the game and had 'obfuscated currency' Simbucks in your balance). And yet these are all also DRM-free. You can install the game completely afresh on an air-gapped computer, and also install all the little package files, and it works just fine.
Maybe [though I doubt it] they're watermarked to the "CD key" to make sure they're only reinstalling on the same base game CD-key they were originally downloaded with? But it's still not DRM, since there's no revocation mechanism.
This is, however, the ONLY example I can think of of DRM-free in-app purchases.
“ if you were logged in to your EA account in the game” - whilst one can argue it’s technically not drm, that is definately online gating.