Black jack tournaments are organized not so often as video slot tournaments. Online black jack doesn't attract that many participants compared to slot machines. But major online casinos always have several black jack tournaments in their schedule.
As you know, there can be up to 5 people playing at a table at the same time. During tournaments participants are divided into groups of 4-5 players depending on total number of players.
If a tournament isn't very big, for example with 25 participants, then the most successful players meet at the final.
If a tournament attracts much more players, then there can be several rounds played before the final table is determined.
This aspect of black jack tournaments is similar to poker tournaments; the only difference is that participants are not constantly moved from table to table.
To make it to the next round, players need to earn more points than other participants. Sometimes there are no final tables and a tournament stops as scheduled. Those who earned more points win.
Usually tournament duration is limited, that's why using basic strategy isn't always the right option. Players need to take risks, place bigger bets than they got used to, let themselves to play those rounds that are not quite playable.
Playing tournaments is significantly different from usual black jack. A lot depends on actions of other participants who won't let you play relaxed black jack, and will always use double and split options.
In this case, since we are talking about comparatively small number of bets in a limited time, many basic strategy rules can be ignored.
Tournaments are always announced in advance. Online casinos have a schedule that tells you when event dedicated to black jack will be organized.
While playing tournament a player usually doesn't place money bets. Tournament tickets are bought in advance and all players are given equal amount of chips.