Time limits likely don’t matter. Tickets are not meant to sit there stagnant and unresolved, so there is probably a limit to how many open tickets you can have at one particular moment in time. You’re not always going to get an answer you’d prefer, especially if you’re submitting them for things beyond a GM’s purview. That doesn’t mean that you shouldn’t mark your ticket as resolved. It’s resolved in the sense that you received an answer and that nothing further can be done in relation to the issue that necessitated a ticket.
GMs have limitations to what they can say and do. Like Darth said, they’re completely hands-off when it comes to Bugs. There are very, very rare occasions where the Devs have dictated a prescribed workaround would be permissible, but Bugs have to be submitted through the Bug Reports forum or through the in-game Bug Reports. Those are totally different from tickets as only GMs respond to tickets. Devs only look at Bug Reports. GMs also don’t take suggestions and feedback, there are other ways to submit those so that the proper staff can see them and take note of them.