If you are using the same formula which takes difficulty, and block reward, in order to calculate btcp profitability, you might get very wrong results.  Usually, for equihash, part of the formula is (difficulty * 2^13).  Based on my results mining btcp for the last 30+ hours, such factor should be 2^5.  I have 17900 sol/s of hashpower.  This got me about 0.5 btcp per 24h at suprnova. Difficulty was high at the very beginning, but for the last 30h is steady and lower.