We cannot mine this coin. How have it been so popular. I do not understand.

Just because you don't understand how DPoS mining work doesn't mean we cannot mine it.

Block are mined (forged) by 101 delegates, elected by those who hold LSK in their wallets (lisk nano, desktop or web wallet, but not in exchanges ones), with a system of votes (33 votes/delegates per batch and 1 LSK+fee per batch).
That's why it's called "Delegated Proof of Stake".
what concerns me also since longer time is #1 delegate Thepool.io. Their acutally 75% share sounds fair, but their 0.2 Lisk payout threshold is such stupid. As smaller voter, I get average payouts of ~0.25 Lisk, but each time 0.10 Lisk network fee will be deducted. So the effective share is much smaller. Tried to contact them via PM, at forum.lisk.io etc. but never get any reaction from them.
You're absolutely right about this "issue" with payouts from Thepool. They/he should at least set a 0.5 LSK payout threshold, or even 1 LSK.
Hard to be a small voter with the way this DPoS system works.