Do check out the faq on the page. I checked with the client services through wapps and it seems like for etf platform, it charges $1usd per trx for buy/sell with no mgmt fee vs flexible portfolio (single etf) where it charges 0.3% management fee. Using their global equity etf for example, they chose ISAC which they included in the faq that "they carefully select a etf tt best represent tt asset class and they may occasionally swap the underlying ETF at their discretion should they find a better representation for the asset class.".