From what I have noticed about bad reviews, there seems to be a confusion between 'Super Backer Club' and 'BackerClub'.
I think the bad reviews are about www.superbackerclub.com
which is a different webiste from BackerClub.co
and the superbackerclub.com service obviously has stopped due to bad reviews.
I have recently closed a campaign successfully, and had used many marketing services, but the one that actually returned with real pledges were the Backerclub.co. The fee (379$) was not processed until I reached 100%, and 24 pledges were added after I subscribed to their platform.
I will post a detailed list of various marketing services I used, its cost and result, but just leaving a short note that BackerClub was quite worth the investment
I'd recommend it.