I Realise VPN Need to be turn ON before the registration of any bitcointalk account
I don't think what you stated is entirely true. There is some thing related to your IP known as EVIL IP. If you are talking about that then yes you have to pay some fee in BTC to use Bitcointalk if your IP is blacklisted. This can happen when you are using shared IP.
Your IP address has previously been used for evil on this forum, or it is a known proxy/VPN/Tor exit node, so you are required to pay a small fee before you are able to post messages or send PMs. You can still use all of the read-only features without paying.
To explain more
People commonly say, "I haven't posted anything before, so why on Earth am I banned?" You are not banned. Your IP address was previously used for evil, so everyone who uses that IP address has to pay this registration fee.