Placebo is supposed to last six months at most, although there could be debate over that.
I'd say the scientific consensus is that, yes, CCSVI is more common in pwMS than in healthy controls. Beyond that, there is not a consensus on what it means that there is an association between MS and CCSVI. (Does one cause the other? Multifactorial? What effect does treating CCSVI have on MS?) But, compared to three years ago, there is a strong interest in CCSVI among the scientific community, in particular vascular researchers such as IRs. Just look at the conferences featuring discussion of CCSVI, and presentation of research on CCSVI. (ISNVD, SIR, ISET all coming up.)
There is research being done, although not the large-scale university research I'd like to see. Brave Dreams is Dr. Zamboni's large-scale RCT in Italy, but we need that duplicated here too.
Some of the pioneers are most definitely better, some are not.
It's not too good to be true.