...remains a mystery, but most like it is a conceptual marketing ploy.
100% wrong as supported by your 75% odds for European approval. Blarcamesine, a proven effective in mild AD with stellar safety and efficacy results in many patients as demonstrated in the results of its Phase 2b/III clinical trial and further documented in its MAA currently pending before the CHMP in Europe for likely recommendation in twenty days for regulatory approval.
Sorry, I think acquiring those patents it sounds like a "buy" to me, so I assume Vamvakides got something in exchange for that and those patents are now owned by Anavex Life Sciences Corp..., no barter arrangement....basically he gave up OWNERSHIP to $AVXL.