It looks like you were consistently winning in both of these sites which is why they restricted you in this manner and is completely legal. Casinos do this stuff all the time in order to keep their businesses afloat since none of them like consistent winners.
The only gambling sites that have no problem with such winners are gambling exchanges, Pinnacle etc op.
Why do you say "both of these sites" ? He is only complaining about one single casino and he clearly named it in the title of his thread. In addition, you say it "is completely legal". How do you know that precisely? Even if it's written somewhere in the T&C in small characters, they must have a valid reason to activate this clause against him and they must clearly notify the customer about that. I don't think any regulated or professional sportsbook will wait complaints from the customer they've restricted to reply him we have nothing to do with that, it's our odds provider who is making that...
I have reached again the support to ask them if I was banned or if the odd provider detected some violation and they gave me the same speech again:
"
They are being set by our odds provider on sport, tournament, match, market and user level.
Keep in mind that it is not based on the amounts you can wager per bet but they are set based on the potential profit from a single bet. If you already made a bet ...........
"
then:
"
If you can place bets in any amount then you are not banned.
"
So I have placed a bet with 0.001 mBtc today so I am not banned ...