no sending any email id or passport, not one person use all accounts, my sister not live with us, but maybe we have each account without referral.
You dont seems to understand the main point. One household signing under each another account as referall already sounds sketchy and on top of that everyone in that household is probably going to use the same IP. Aside from that, there is no legit way to prove that you are not trying to abuse the site by posing as several people using different account
for premium need only buy 2500 tokes Fun and hold, or lock?
Buy and hold but you might as well just lock them if you are planning to get the premium membership benefit