[delta-chat] High join requests on Transifex

Hello, in the last 3/4 days I've seen an huge rise of the DeltaChat translation teams join requests. I've also noticed that many of them (4 pending user at the moment, 3 Russians and 1 Ukrainian) have all signed up on Transifex today. I suppose that some of them may be spammers or something like that. I usually don't approve/deny any non-italian user because the Language coordinators can do that, but I'm afraid that these users can do something bad. On the other hand, these user could be real users that just want to join the project... What should I do in your opinion? It's better to leave the Language coordinators the choice to approve/deny the users or it's better to send a message to these users and see if they reply? Some big projects ask some questions just to be sure if the users are real users. Thanks, Enrico