No. If they would have restricted it, or even wanted it to... you would not have been able to access anything through it at all. the reduction is due to a handful of factors including the server count, the distance from the region you're trying to connect and the rest. I'm using Ivacy VPN to secure my transactions and sometimes, to unblock geo-restrictions. and my ping time increases too when i'm streaming from a japanese or an australian ip, but that's because of the distance and is perfectly normal.