Raffles are great, especially if reward is going to be Bitcoin.
I have nothing against raffles with physical items (hardware wallets, cards, etc) as reward, but many forum members don't want to participate because they want to protect their identity and personal information.
There is no shipping, delivery or customs issues with Bitcoin

It would be logical if Jambler did not organize a raffle with physical prizes. Even partners or investors are completely anonymous because all communication is via telegram (bot). I don't expect them to violate anyone's privacy because of the raffle, even if it was through an intermediary.
If it were to happen, Bitcoin as a reward is probably the best solution.