I recently observed a French YouTuber opening the new Scarlet and Violet set (2 ETBs and 2 3 pack blisters) and saw a sequence of commons that were the same at least twice, so was wondering if it was a consistent and reproducible method which from your research seems to suggest so
Are Energy Pokmon Cards Worth Collecting
The counterfeits included both Japanese and English copies, ranging from original 151 set Mewtwos to highly coveted full-art rainbow Charizards from Sun and Moon s Burning Shadows expansion
(Surging Sparks in English)
The only downside to it, I would say, is that it is level 7, therefore it doesn't XYZ into Cyber Dragon Nova unless you use Drei (Which shouldn't be a problem since you could still Normal Summon it), but I think it balances out, with the massive XYZ potential this card lays out by itself
Mega Latias Ex #88 Pokemon Japanese Mega Symphonia Keep track of your collection value over time