The parameter is a random value, but who knows what it actually does. Searching the domain also gave me a reference that it is indeed a suspicious site[1]. I look further to the site code, they partially use coinb.in code and adding up some code by themselves.
i am using blockchain for last 7 years but getting some issues recently i have 22 USD in my wallet but i cant send them or swap them. coz its not showing in maximum balance maximum balance is showing just 0.05$
which other bitcoin wallet is best? and which one you are using?
You can import your private key or seed phrase into your https://electrum.org wallet and withdraw your bitcoins.