i have used minergete and mined few monero and bytecoin with it and withdraw it without any issues. Upon withdrawal request they will send you an email with confirmation link.You need to click this link to process the withdrawal request.
I work in a computer in lab and there are 50 system (core-i3 + 4GB RAM). I know cpu mining is not much profitable but i am doing it just for fun and learning purposes (systems remain idle for most of time ..) Apart from monero is there any other ALT coin worth mining on CPU?
minergate used to have browser mining option, Also nimiq also has browser mining option though it is only for testnet. Some say as the plugin is implemented in javascript it would not be feasible or efficient but in case of websites with huge traffic specially video streaming website where user spent lots of time watching videos I think webmasters will make some good money.
yea hands down blockfolio is the best app for mobile But it doesn't have backup option and in situations where you want to switch your cellphone to new one then you'll have to enter the transactions manually. I think backup and import feature will be available in the next version of the app. I use https://altpocket.io/ it is a good alternative.