I'm not quite sure I understand your post. Yes, Premier Accelerator is fairly well known amongst the FT community. Do people buy it? Well, that's a tricky one...

As we get closer and closer to the end of the year and people start to realize that they don't have time to do a MR to hit/re-qualify for the same/next elite level, many FTers will start to look at the Premier Accelerator as an option to close the gap. It's not cheap and the price isn't fixed. In fact, many have observed the CPM for Premier Accelerator ramp up towards the end of the year when the folks at MP know that people are desperate.

IMO, a MR at 3-5CPM is much better value than paying $1000 for 3x the PQM on a given flight. But, if you've got cash to burn and/or don't want to do any more BIS miles for the year, Premier Accelerator is a good option.