The following bookmakers and gambling companies are no longer recommended.

This can have several reasons:

Those companies have shut down my account and kept my money with some made up TOS explanations:

ComeOn
Betfred
Betbet
Staybet
Unibet
Redbet

My rekommendation is take your money and run from those 6 companies.

Those companies have shut down:
7Palms.com
BettorsTrust.com
betxc.com
Davidsons
Dobets.com
Playit.com
Pointbet
Rock Island Sports
Sportfanatic
SportingOdds
SportingOptions
SportingbetUSA
TV3Bet
TradeBetX
TradeBets
TradeSports
Virtualbookmaker
Aebet.com
Bet19.com
Bet247.com
Betabet.com
Betclass.com
Betoddoreven.com
Betonsports.com
Betzone.com
Capitalsports.com
Caribuk.com
Cbmbookmaker.co.uk
Cbmbookmaker.com
Easyodds.com
Eurosportwetten.com
Getmoresports.com
Goldmedalsports.com
Jagbets.com
Kwette.com
Littlewoods
Mrbookmaker.com
Mvpsportsbook.com
Oddsexchange.com
Paradisebet.com
Set2go.com
Sportbetting.com.au
Sportwetten-gera.com
Swapbets.com
Vierklee.com
Wetten-schwechat.at
Worldwager.com

Those companies have some problems that affect earning:

Admiralbet.com
Betmaker.com
Bookmaker.com
Boylesports.com
Caribsports.com
Easybets.com
Fonbet.info
GWbet.com
Ibetx.com
Instant Action Sports
Instantactionsports.com
Paddypower.com
Scandicbookmakers.com
SportOdds
Maria
SportingIndex
Stanleybet
Wettpunkt.com
World Sports Exchange
Wsex.com

Those companies have behaved very badly, you risk your money:

Oddsring