Who's using random cascades with Nats?

[BNMedia]

I've got four billers to process with for www.kinkykicks.net now and I don't like hiding them in cascades, so I'm trying using weighting in NATS to throw alternate billers at surfers progressing from the pre-join page.
I've set it at the moment so that all my CCBill affiliate referrals obviously get a CCBill join page, then I've set Epoch and Verotel with the same credit card weighting so that surfers could receive either one on the signup page. I suppose this is pretty much like an A/ B testing scenario for billers.
It's been a quiet few days with all billers this week so it's hard to comment right now on how any particular biller converts, but I'm hoping that this will change after people get paid on Monday!
Just wondering if any of you guys are using this feature in NATS and if you think it's worked for you or not. My only fear is that potential subscribers may get put off by inconsistency but I suppose it doesn't hurt to try it. It's kind of nice as well not having to put all my eggs in one basket!
(My fourth biller is GXBill which I've just got setup to process phone / sms billing )