Getting Ready with Promos for The Samsung Galaxy Event This Month

This month samsung will announce their new product line up, including the new iphone foldable competitor the Samsung ZFold 8 Wide,

Now for signing up to the unpacked event they give a $50 gift card, what's interesting is that you can also purchase a "Galaxy eVoucher" which costs $20 and will be worth $100 in credit towards the new mobile products they release (which they don't specify as they haven't been released).

Now I know in previous years stacking coupons was the go, will it be worth buying these eVouchers? I assume they will only allow for one redemption / purchase of the voucher per order. did they have this last year? I'm also not dead set on the fold as I want to see announcement info first, but also want to get a deal where possible.

Any other promocodes that may work well? I believe last time around there were June or July codes that overlapped for a few days while the preorders went live and allowed for cheapies to maximise savings, any ideas this time around?

I also have access to the EPP store, so am hoping to get the best deal if I end up going with the fold.