Hello. I have considered using it before. I've got a couple project ideas that would need it. Haven't actually much unallocated time since it became available free.
Only thing to consider is that some transactions Splinterlands wise have failed previously (rare - e.g page not updated from previous tx) or it could be duplicated. You can do an individual checkup tx with on the Splinterlands API with the tx ID though, and that goes back further than 30 days.
What were you working on?