Interesting - you consider almost $6 bad ? I'd be happy with that daily average, at least with today's new standards of mediocrity, considering most surveys now are under 40 cents. My day here yesterday, $2.60, now THAT is bad.
Considering you had amazing months since January, I'd say you are doing OK - I would not worry about a few low days in your case, don't let those lower days get to you, you are still in a good spot for now. You would earn far more if the survey pay rates were DECENT, and not insultingly low - survey pay rates were cut more than TRIPLE over the years, it's insulting quite honestly considering they expect the quality of the data to be intact - if anything, suppliers should increase pay rate for those who have high quality and consistency - I mean routers DO keep track of internal metrics to measure quality - but no.......greed wins, they keep lowering the rates, so yeah, it's pretty hard to earn decently on one site alone now. That $5.xx you earned would be worth at least double or that or more if the rates were what they SHOULD be.