Souvenir packs in CS2 can give you unique variations of skins, which usually cost significantly more than the regular versions. During the existence of the game, the rules for dropping souvenir weapon variants have changed several times. There are several ways to get valuable containers from which they drop.

When can I get souvenir sets?
Souvenir packs are associated with major CS2 competitions and drop during the event period. The easiest way to get several sets – Buy a Viewer Pass in the in-game store during the Major. It is sold in two versions – complete with or without three souvenir tokens. Each of the tokens can be exchanged for a souvenir pack associated with any of the completed matches of the major. The result is a little more profitable than purchasing a spectator pass and sets separately.

In addition, during the Major you can get additional souvenir tokens by increasing the level of your Pick’Em coin. Since it has four levels (bronze, silver, gold and diamond), this way you will be able to get three more tokens. This method only works directly during the major, for example, in the case of PGL Copenhagen Major 2024, until March 31.
The number of souvenir sets that one player can open is not limited. If you want to get more than what is described above, they can be purchased separately in the in-game store.
Old souvenir pack drop system
In the early years of the game, obtaining souvenir packs in CS:GO was arranged differently. They were randomly given to players who watched the competition live stream. For example, during the game on the final map at ESL One Cologne in 2015, about 20 thousand containers were distributed. Considering that there were about 1.2 million viewers, it turns out that only 1.6% received awards. In addition, the sets were signed with an “autograph” the best player of the current round.
Such a system existed from 2015 to 2019. Souvenir sets that were released during this period are presented on the market only in small quantities. The most valuable of them – Cobblestone. It no longer drops due to the card it was associated with being removed from the competitive mappool, and it also has a low chance of yielding a Dragon Lore souvenir AWP.
How to get souvenir packs from past majors?
If you want to get old souvenir packs to try your luck at opening them, the easiest way is to purchase them from a third-party site. For example, in the Lis-Skins.com catalog there is a wide selection of sets from the majors of past years with different collections.