You could earn SPT by making content and adding spt in tags, simple answer.
But to actually earn something that post is supposed to have a nice payout, the better the conten is the more the payout the more spt. And obviously more Hive which you can later convert into spt or DEC whichever currency you prefer.
oh okay okay I just read it while queuing in ranked match but its too fast. The only think that I saw is earn SPT in splintertalk! LOL thank you, now I know thanks