It is something that happened at skrill/neterller, where it is most alarming, because they are defacto a bank. Than it happened at BetDSI (where they supposedly even offer interest). Happened at bets10.
I think (not sure) it happened at Pinnacle and Bet365 too (pardon me if I am confusing something).
I think if I leave money for 5+ years at random bookies, I will find them at less than 50%. The rule is sometimes "because you did not log to account for X months/years".
Just a nature of our scammy reality.
Where this did not happen was 5dimes RIP. They kept my forgotten balance for 10+ years.
If you talk to God, you are praying; If God talks to you, you have schizophrenia.