1. Claims of payment fraud. I actually clicked the BBC article linked about payments fraud it referred to. It was an article about a criminal syndicate stealing credit cards. It mentions buying cryptocurrencies, AI API purchases are not mentioned.
2. The claims that they are reselling the chats to AI labs. The post you cite is speculating it could be, but this is unverified.
The claims of reselling is also bizzare. Arbitrary user prompts are low quality data. If I were an AI lab, wouldn't I just pay for the API proxy and get targeted output for far less?
Also calling it bot accounts is a stretch. Bots mimick human input. These are proxy accounts.