I guess the promotions that casinos has had in the past year of being free (mostly) from the lockdown proved to be rather effective, and people are being more lax with how they spend money (regardless of the current economic situation I guess).
Now that there are no lockdowns anymore, I think it's expected that the revenue of the online casinos will now decline by some percent as people are now back on their good old routine. They are now busy and need to allocate money on a much important things than in gambling. It's not totally a sad news though.