I honestly don't think that my account can receive spoils, lol. The blob was in water and there was just a handful of people smart enough to stop shooting arrows and actually slash at it in the water, myself included, and I still didn't get spoils.
Maybe the issue is that, one day, I wasn't identified and I was on a nub account. I went to the slime on that account and killed the blob and received spoils (this was the last time I got spoils). Then I identified so that I could open the spoils. I haven't received spoils since then.
I could just be unlucky, but I'll try uninstalling and then re-installing the app.