Newbie enquiries about purchase signal and YTD report?

 

Hi guys, nice to meet you all.

I am just a newbie for mql5.com, I have seen some services such as signal provider and EA but there are some doubts that I cannot understand. Please help me! 

The first one is for the purchase issue. What happen if I purchase a signal cost me for example 50$ but the provider have made no trade since the payment?

The seconde one is about the report YTD. It can be clearly seen that some provider has a nice YTD report, up to 400% for 4 year, but when we look at each year the sum is not correct. I have attached an image below for this issue. 


PLEASE HELP ME GUYS! THANKS SO MUCH! 

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