So let do a bit of Math.

If i pay 55 SBD for a week and post twice per day i will have a total of 14 votes in 7 days.

And if your 50% is worth $8 i will get 16$ per day for my two post.
16*7 = is 112

So will be getting 112$ for my

But i dont understand what you mean by i lose 1 day if i post more that two times per day.