Nobody knows details... The fact is CLIENTS ARE NOT GETTING THEIR OWN MONEY FROM THIS SERVICE !! Including myself.
THIS IS 100% true. What other expert  opinion are you looking for?
Who cares if it is DDOS, arrest of some guy, security or financial problems... Clients can do nothing and EXMO team resolves some tickets and posting about it here, leaving thousands tickets unanswered without any reasonable explanation.
You say it is DDOS - but site is working fine. Network overload - but EXMO operations are not on network while other operations just fly - meaning it is not the problem of the network but EXMO!!  EXMO just doesn't send anything to network... even when they set PAID status.
They gave all of us nice NEW YEAR PRESENT - leaving us without our money..