I did a search for casinos in my old email add i used before.
The earliest i could find was from 2008 (a long time before i found CM), so i guess it must have been around that time i started with online casinos.
However, i mostly found names that i dont remember playing at..
Here is the list after i checked up a bit on Google:
Aladdins gold (Corrales group)
Banana gold (Closed)
Belle rock (?)
Betonbet casino (Closed)
Blue square casino (Closed)
Carnaval Casino (?)
Casino fantasy (Closed)
Casino splendido (Online)
Cirrus casino (Closed)
Class1 casino (Closed)
Cleaopatras palace (Closed)
Games xtra (Partycasino ate them up?) Was 1 of my fav casinos before
Gocasino (Closed)
Golden tiger (Casino Rewards)
Goldvip casino (Blacklisted bad guys)
Jackpotcity (The Palace Group)
Joyland (Closed)
Ladbrokes (Online) I still play there
Lucky nugget (The Palace Group)
Mummys gold (The Palace Group)
Partycasino (Online) Played there a lot before
Phoenician casino (Casino Rewards)
Planet 7 (Crystal Palace Group bad guys)
Platinum play (Fortune Lounge group)
Playboygaming (?)
Playgate (?)
Prestige casino (Closed)
River belle (The Palace Group)
Ruby fortune (CityViews Group/Bayton Limited group)
Silver oak (Blacklisted bad guys)
Skykings casino (Closed)
Spin palace (The Palace Group) Was 1 of my favs before
Vegas red (Closed)
Vegas regal casino (Rival casino)
Virgin casino (GameSys group)
Vipcasino (Closed)
William hill casino club (William Hill group) Was 1 of my favs before
I remember i played a lot at: Games xtra (had some nice winnings there), Partycasino (no winnings?), Spin palace (some winnings) and William hill casino club (some nice winnings there).