SP holders who don't curate are losing about 8% annually, but if they curate, it will decrease to around 4~6%.

financially speaking, the 3% difference is just too small to justified the time and effort invested.

IMO, the psychological satisfaction sometimes weight much more to a curator than any financial rewards.

and I'm agree with Hive account@snowflake in his point that, the increase in platform-quality and thus the value of SP could eventually benefits SP-holders more.