I was in Fundraiser 1.0 5 years ago and had NO problems with getting paid. I just went straight into the 10th Level with my group so I raised $1,500 and then my group got distracted with everything and we stalled.
Always got paid...and now they use Payza (Alertpay) so it should be o.k.
You best bet is to have a team that commits to each level and helps each other out. Our plan was to go in 20 members strong and stay the course thru ALL levels.
I will probably try it again with a stronger group now.