You can put your SPS up against your DEC in an LP to earn double the airdrop points. 

Say you're holding 10 SPS liquid. It fluctuates but let's say today that's worth roughly 380 DEC. That 380 DEC is worth 380 airdrop points, but if you put it in the pool with the 10 SPS, you'll pull 2x the points for a total of 760 airdrop points instead. You can add liquidity before the snapshot and remove it afterwards on a daily basis if you don't want to risk leaving it in.