I just wanted to share my opinion on this...
I spent a month on Stars a couple weeks back, and the highest games that ran regularly were 30/60. There was some 50/100, but very little higher. And that's across the whole internet, not just Stars.
So asking people to play 100/200 hu matches seems a little extreme. For starters, one player is likely going to get buried pretty bad and won't have any good way to make up the losses in the near future.
Also, this is LHE... bots/cheating is a major issue, especially hu. You need to really trust your opponent.
I just think this would work a lot better if you made 50/100 (or even 30/60) an option and gave people the chance to play grudge matches or friend matches. I know KPR and ZZeigler, for example, have a rivalry and sometimes play each other at 1/2+ huhu for fun. Those are 2 extremely strong, well known players.
I just think this proposal was overall very unclear and unrealistic. A confused mind says "no". Make sure people understand the terms of the match, how long it will go on, the structure, and most importantly... give people the chance to choose their opponents. It's not like it used to be, but there are still enough strong LHE players who like to rip each others' throats out to get these promotional matches going imo. Why is it necessary to jump right into 100/200+ matches? Gotta start somewhere