You probably were on a very unlucky pool or solo...
Until the last two days you clearly could make much more Zeit by mining it instead of mining doge or pretty much anything else and then converting it to btc and buying zeit.
Pssst... Don't tell them because they seem to know better...
The difficulty was so low (up to around 5) that you made tons of ZEIT by mining in a good pool.
So to make it even "SIMPLER" for you:
With my hashpower mining Doge gives me about $13.50 per day.
Whereas mining ZEIT and selling it at 2 satoshi gives me $32...
Hmmm, I wonder which is the better deal?

?
SIMPLES as you said!!!