I thought it is completely free spins but in fact 50EUR deposit is required for this promotion.
Why dont you try to give pure free spins for bitcointalk members as a starting promotion in this forum?
You may get some feedback from such promotions where players can try your site for free without any risks.
I agree.
Some free bonus must be in order, to attract the new players, as for the new projects players are cautious to deposits before playing.