nah, I've not (yet?) been invited for the 3.8%...your 3.55% invitation probably earlier than mine (sep23), just like how your current Dec23 invitation 3.8% higher than my current 3.65%
well, even the public promo rate is 3.6% now so I'll just enjoy it while it lasts.
hopefully HSBC EGA will respond with a better rate for January.