I support this. Not to keep OMNI out of Google, there are easier ways to do that, but to maintain the focus on frequent flyer/guest programs and travel. Someone who doesn't find FT valuable enough to stick around for those reasons won't stick around long enough to get into OMNI. I think that's fine.
I think the removal of the restriction had to do with building traffic to the site. May have made sense at the time, but the specific reason for removing it then no longer applies - so let's put it back!