Bitfinex asks 25k $ for opening an account which is impossible for most of us.
This is not true. There are no account equity minimums to start trading on bitfinex. I believe you do need a verified account to buy LEO via bitfinex.
The primary advantage of LEO is the fee reductions for trading, and lending on bitfinex. Bitfinex will also use 27% of profits, and the majority of money recovered from the 2016 hack, and from Crypto Capital to buy back LEO tokens at market prices.