As that guy mentioned, these type of events, it's more worth it to sell the bundles rather than open them yourself.
Indeed, and best is to sell during the first 1-2 days, after that the prices drop a lot. But it gave quite a nice profit, so I approve of the event. It's up to everyone to decide how to play the event, either sell or gamble with opening them. For me they break a lot after +7, so I decided it's not worth it.