I think the new plan is too expensive for most people,and you shouldn’t change the old plan to the new one focibly.
Yes. PPT is harmful to the proxy application like Shadowsocks, with IO simultaneously billing they will pay out 2x traffics.
Sorry for this policy introduction but as you might be noticed, there was announcement at the top of dashboard if you were one of users using the old plan. 
Please understand our new policy to keep Somagu service alive.