There's been a lot of information written about webetcoins. We had them rated "F" and they do owe people.
https://bitcointalk.org/index.php?topic=717790.0"A" rated booksAnonibet A (2011)
NitrogenSports A- (2012)
"B"rated booksBetcoinsports B (2013)
Casinobitcoin B (2013)
Cloudbet B- (2013)
Jetwin B-(2013)
"C" rated booksBetVIP C (2014)
BetOWI C- (2014) *
"D" rated books Betmoose D+ (2014)
Fairlay D+ (2013)
Coindraft D+ (2014)
Roadbet D+ (2012)
OLEBitcoin D+ (2013) *
"F" rated booksBetCas F
Webetcoins F (2014)
Bitbm F
Bitcoinsport F
Bitcoinlivebets F
Coinbet F
Gobetgo F (2013)
Sportbet.im F
StakeBTC F
Blockbet F
Bitbook F
NR
1player
7Bit
altbetfair
Asianconnect88
Betabit
Betbanks
Betbtc
Betmoose
betxcp
BetXCP
Bitcoinvegas
Bitesports
BTCBook
Coin178
Cointeller
Darkbet
Evolvebets
Fairlay
finalstake
Flutterclub
Planetofbets
Pocketrocketscasino.eu/sports
Predictious
Premiumtradings
tdsports
xbet.io
* longer accepting cash deposits
Maximum grade based upon time in business:
A - 2 years
B - 1 year
C - 3 months
D - 1 month
F - reserved for books that are scams, slow paying or stiffing players