They have a "credit" system that they use, but they use it to screw over their customers by using an expiration system to take your money. I bought a bunch of credits and when I was finally ready to use it - it showed 0 credits. I asked them about this, thinking it was an error, and they simply said "The credits that you purchased on Nov 17, 2021, have expired. Credits expire after a year of purchase."
They never made users aware of this when purchasing and there's literally no reason to do this other than to take money from customers.
I would advise you to NOT spend your money with this company.