Try on spending very low amount on couple of sites and check which looks real, too good to be true and if it is actually working.
Dont add funds on site which claims too high minimum deposit.
Choose any payment method which they cannot do charge back
Add lower amount which they cannot charge back to original payment.
This happened with me alot of times, if i use credit card or debit card to make payment, they usually charge me after a long time when i was not aware of payment, fortunately, my bank asked for otp and they dont have it saved me big money.
they i threatened them by call or email to remove my card, i will contact cyber police and they removed it