There is a daily housekeeping job running. If it detects that the same script, tag and gccode exists many times, it will remove the newer tags.
If we notice that this is done in an abusive order, actions will be taken. Actions will probably be that we remove the option for that user to create checkers and/or tags.
If you have seen this, you are welcome to report it. Contact our support if you want to do it more anonymous.