The Manual withdrawal model is used by few casinos and it entails approving pending withdrawals manually. This help the team to check each pending withdrawals carefully before approving although it can take a lot of time before withdrawals are processed. Emergency withdrawals do not work with these kind of casinos and all you have to do is to be patient with the team until they approve your pending withdrawals.
This is what I think is being used whenever I withdraw. It takes time, but I am not in a hurry, and that's okay. This ensures that Spinly is able to approve the withdrawal requests that are fine and clean. Having that said, being able to wait could be tiring for those who are not used to it but with the withdrawal fee that's low and just a few cents, that's a big savings not just for me but also for Spinly.
Compared to other casinos that have instant withdrawal model, Spinly does not work like them and once you understand the pattern of withdrawal on this casino, the complain of late withdrawal approval would be limited.
The first time I made use of Spinly, I waited for the transaction to be approved for several hours until I noticed that the withdrawal model of Spinly is different from some of the casinos I have used in the past. I have also used casinos that have slow withdrawals and I understand what it takes to withdraw my funds.