Sadly yes there was a limit since we made the promotion for only those from the forum. We had a 1000 usage max limit and didn't expect it to be used up this fast. A new promo code will be posted, I have communicated this to the team.
Sorry I have to say, but this is probably case of abuse and some users creating multiple accounts to get this promotion.
There is no way all 1000 real members registered on Richy casino website in just few days since you posted this topic.
If you want to give free spins give them only to reputable members for testing your casino.