Butterfly can do everything from List A (except 2 tier I believe where you need to amend the script using something from Becky Dielman?)
I have heard good things about LaunchFormulaMarketing but I'm not sure whether it can do point 2 - paying invited JV's a higher % commission over normal affiliates which is really important to me. But you're saying Butterfly can definitely offer this?
You're also saying Butterfly had a huge problem with Authorize.net (may be sorted now),
What else would I need in addition to Butterfly in order to complete the end-to-end picture?
1. Aweber (which I have)
2. Payment processors / merchant accounts ???
I may well look at Extrememember, but for now I'd just like to explore what other marketers currently use and recommend.