Not going to happen, the only people that sign up for these kind of sites are from poor and from high fraud countries.. They will sign up if the commission is big enough, get paid, then request a refund from CB. They will clean you out without even thinking twice. Also you are not going to reach 100k registered members, that is wishful thinking so you can close your lil windows calculator now...
I have run many PTC sites. To reach 100K members will take you over a year unless you run an unstable type of site like buxhost or something like that. As for people investing, yes alot of people do invest. I ran a couple buxhosts and had people invest over $100. What you have to understand is that the reason people invest is to earn more money. Also im not sure how you plan on promoting clickbank (never used it with a PTC) but if your going to use it as part of the PTC you will no doubt lose money. If its a banner or something like that, you might get something and then of course it is worth it (even though with 100K members you could probably earn more using another banner like adhitz or something).
You wont find it easy to promote CB on any PTC. I used to run one and had a close relatio0nship with many of my members, and their conversio0n rates fro CB sites was way down.