if they're not giving you a ton of info or things seem too sus best to just go with your gut if it's feeling off
sometimes it is a matter of poor communication but if they want to properly go about seeking people for a collab they'd use the available channels like the forums or the official tapas discord or have more detailed info about what it is they're trying to request
might also help to see if they've got a history of activity anywhere else and how long the accounts been around. there's only so many ways to vet an account but something you just gotta take the chance with saying no then get caught up in an even bigger mess