Yes, my system is so simple it can be provably fair by exchanging some messages.
I talked to the contact person I have for Playgram and this was a part of his response.
Hi, thanks for bringing it tou my attention. I believe it's probably not something our team would be interested to check. ~snip~
As the reason he told that it could have a security threat in their system. I don't understand the technical but I am sure the team checked every possibilities before replying my message.
I will try to contact with some other contacts I have. If I have anything to share then I will post here.