i had tried mining on pool with the hash rate of 50 m/h but unfortunately i was alone in pool at that time and got message "stratum connection interrupted" while mining as difficultly has increased. for only 50 m/h its difficult to mine please decrease notify timer. Also is there any issue in wallet registration i cant get my self registered. so i just use exchange address just to check.
Which difficulty you use for mining.
and at current time if you mine with
https://www.nicehash.com then without purchase mining machine you can get good profit.
and if you use nicehash then you have to use biggest difficulty port.