I just read that too. The wording, however, is really unclear. The article alludes to it being a replacement, but Marvel's press release excerpts talk about "additional digital content". So I'm less than clear about what's happening.
Edit #1 - the Marvel guy quoted in the article does say it's a "replacement" program, which does imply that the free digital copies are going away.
Edit #2 - I don't have much skin in the game as I don't buy many Marvel titles anymore, but this offering a first issue taster to promote a current TPB idea just seems like a complete waste of time. Anyone still buying a Marvel monthly will probably either have already read the issue in question or have already made up their minds on whether they want to buy the TPB. I seriously doubt this is going to change anyone's minds.