I know, for this promotion seems too hard to complete. But, this bonus given as free of charge with no initial financial risk to the player.
Waste mostly player time.
I joined this promotion just thinking that this bonus part is a simulation to try out the game features and the casino interface.
You can use demo balance or majority casino are supported 0$ bet. Can use 0$ bets on Originals (if they have it)
This promotion can be a strategic decision about whether or not to deposit after winning.
More like it turnback to casino it self, cause majority player will disapointed.
Probably big bettors or whales, and that is if they're not really interested on unlocking everything.
Whales ? Nah, whales seeing these already not using it and whales will not gonna to use promotion like these

. Even the whales winning a maximum balance 1,000$ he needed waggering 100,000$. If you think widely, with house edge even a player deposit 100,000$ and play safe just losing the house edge. He still gonna to lose it, cause majority in slots house edge the highest one is 98% RTP.