Well, you know pilots, we're always willing to give advice, whether or not we know what we're talking about!
However, I think for standbys, you probably won't get credit for trip revisions (like deadhead deleted), but I am certain that you get the draft pay for being extended. Plus, you will get paid for additional duty periods. I have pulled Indy standby and gotten both. Might even get credit for more than 50% of layovers changed. I suggest you file for everything you think you might be entitled to, and let crew pay make the yes or no decision. However, the 150% pay should be automatically credited to you without request. Let us know how it goes for you.
I don't know that you need to call them, but at least file for any possibility. The contract is confusing, and it's too bad this isn't automatically applied without a paylog.