I used Winminer for the first time a few months ago, and it was my first time ever mining from a PC and I am grateful that this user friendly software allowed me to mine in few minutes from downloading the software. Also it offers really nice payment options.
It basically made me discover that is really possible to get paid for the use of my PC.
Then after a week I upgraded to 2 Radeon Vega and from there I began exploring the best use for them and stop using Winminer and began pool mining and later on NiceHash.
To make a long story short, now I have a new hobby with a few rigs with Vegas and X580 and I exclusively mine on pools with dedicated software and Nicehash, but only when their Criptonight "coin" is very high. However Also on Nicehash I mine with my software (Cast miner) to their pool. I do not use their software, bacause like Winminer, their settings need to be generic for working on almost any PC that they are downloaded to, therefore they cannot be tailored for your specific GPU and you loose quite a bit of performance.
Today I tested again Winminer for a couple of hours on one rig with 6 vegas and although I was getting the right hashing for Ethereum of 43Mhs per card, the projected payout was less than 5 usd per card, instead of 6.5 usd that I would have got mining on a Ethereum Pool at the same exact time. Same for Pirl.
I had noticed the same mining Monero 2 months back, which was the reason for stop using Winminer.
For Ethereum, I use the exact same software (Claymore 10.0) which is also what Winminer uses under the hood. Today the payout should have been very similar.
Beside, today I tried to mine the Cryptonight algo with Electroneum or Sumo , but winminer could not even connect to a pool at that moment that I have tested.
Electroneum and Sumo are the most profitable coins at the moment of writing, yet winminer could not even get them to work.
Bottom line, if you are new to mining and you have just a PC with one GPU or a couple of old GPUs and want to make a few bucks, Winminer is a good option, especially for the easy set up and check out they allow you to have.
Yet if you have anything better than 2 GPU, is worth taking some time of learning how to mine directly to a large mining pool.
On a different note.... Nicehash may take some of your money under the table as well, because you never get your full worth of GPU Hashing power either, it is at least a 5% less on top of their fee. I am quite certain of that and that must be the reason why they do not display anywhere on your account page, the average hashing power per hours or 3, 6 hours. They display only your projected payout in BTC or USD. They display real time calculated hashing power once in a while, but since it fluctuate a lot and it is not charted and you can not make any estimate out of it.
for Sumo or ETN, since I always set the Vegas of my rig to mine Cryptonight based coins, the program doesnt usually fail. Today I switched to All Coins mining mode, and surprisingly enough it kept mining ETN.
The system to switch to the most profitable coin is not always the most accurate, though. Sometimes you get to mine Eth and other algo at 4.50€ card, but I change from All Coins to my manually set Cryptonight coins and when it mines Cryptonight it produces the same or more, however the Vegas run better, they dont heat up as much, so it is always the best choice.
On my Ryzen 1500X and RX 570 I have WinMiner set to All Coins and I dont mind, it makes like 3.50€ day, and as for my laptop's GTX 1050Ti I also set it to Cryptonight coins because the GPU stays in the 48ºC - 50ºC range, which is great for a laptop producing 1€ a day.