The President of Panini France explained on tuesday that the firm uses a special algorithm to randomize all the stickers for a single collection. According to him, every single sticker is produced on the same quantity than every other. He said they were inspected several times by governement agencies that never found irregularities.
The algorithm allows to fill every packet with different stickers, but regarding the 100 packets boxes, the CEO also explained it was calculated to create around 10% of duplicates in each box.
Panini France president should apologize for calling us stupid with his pretty words. They should be transparent about their work and they only are when there's some TV interested in filming some making-of video.
I can give dozens of collections where some stickers are produced more than others... Just some examples:
FIFA 365 - 14 normal stickers more produced than others (in the iberian edition) and pretty sure there are shinies more easy than others;
World Cup 2014 - 200 normal stickers produced more than others (a complete sheet with 20 players for 10 teams was definitely more printed than others);
Champions League 2014/15 - 30 normal stickers more printed than others. A lot of shinies are more easy than other shinies too;
Euro 2012 - again, the same as World Cup 2014, 200 stickers printed more than others... And shinies? You all know they're more rare than normal stickers.
This is just an example, because there isn't almost any collection with all stickers printed in the same amount... The only one I can remember who is completely homogeneous is World Cup 2010, all stickers were printed in the same quantity, if we talk about sticker boxes and not promos given, like album + 6 stickers
If this is bad? Not really, I don't mind if they produce more from certain stickers than others, it's more "charming" to collect, in my opinion... If they explain the reason why they do it, which is because they print by sheet and not by sticker (one sheet can have to 200 stickers, so they produce by multiples of that sheet), people will understand.
About the doubles, they already make more easy for us to get less doubles per box than what we should get, if everything was completely random (you can't expect to get 450 different stickers in one box without Panini help)... The problem with the sorting machines is they only follow certain patterns and it's not so many different... How many times have any of us opened a packet and claimed "oh, I got the exact same stickers I got in a packet before!"? Employees who insert the piles for sorting usually do the same way, the same order... Even with sorting machine, there wil be countless of patterns repeated, which in the end, makes this whole randomization thing completely predictable.
Caniggia is right though: most people buy some packets from time to time, maybe from different places too, so this makes everything more random... But it's the buyers who do it, not Panini.