I was mining Digitalcoin and Worldcoin for a while and was always wondering why I didn't get the payout I calculated. I always got (considerably) less.

Thanks to coinchoose.com now I know why. It's because of the high stale rate of these coins.

For example Worldcoin has "% Profitability of BTC" : 109.92%
But "Profitability % Adj for Stales" is only 73.90%

Same for Digitalcoin: "% Profitability of BTC" : 107.52%
But "Profitability % Adj for Stales" is only 81.04%

All those fast coins have this high stale problem (e.g. Fastcoin has profitability 97.21%, but adjusted for stales it's only 57.18% !).

So it's actually much more profitable to mine other coins.