2. VIP Promotions tab - as far as I was analyzing, there are only the Winback & Leaderboard promotions ongoing (?)
Yeah, there should be a promotions tab where promos are listed for ease of use + better visibility.
Aside from what you mentioned. AFAIK, VIP tranferees this season also have access to salon rouge which has another set of rewards. This was also only introduced recently so I imagine team may add/tweak some stuff along the way.
They also give out boost codes on telegram, see:
https://t.me/MWINBOOSTSIf you wager at least 250 bucks last seven days, you get free spins on fridays--typically 20FS @$0.60. It's not much but if you end up winning at least 5 bucks from this, you can enter an exclusive giveway on discord.