Even if the accusation of blockbet of girlbtc isn't true, he is still making alt accounts to make his site seem desirable to play on. Very very scammy behaviour. Plus, his alt is literally posting with no gaps on random threads to get people's attention.
I would actually agree with OP, even though there is no tangible proof. There is a similarity that cannot be ignored between girlbtc and blockbet, same sort of business model(or should i say scam model): On chain betting, different categories of betting, "bonuses" that require you to bet on the site which are too good to be true and in the end they rip you off. Plus, the broken english.
OP, can you provide proof for the site of blockbet being hosted on the same server as girlbtc did? That's not 100% proof but it's another step to catching this spammer/scammer.
Just some other alts of girlbtc suspected by me, you can compare and see the similarities: btcfanbei:
https://bitcointalk.org/index.php?topic=1723087.msg17269629#msg17269629fairnessandpublic:
https://bitcointalk.org/index.php?topic=1718579.0