Lottery through cryptocurrency is good, but it won't be fair in reality. Most of the lottery have the jackpot winning for an user and the rest gets nothing. Another distribution scheme of lottery has come to existence recently, but that requires certain number of participants. This way it is quite hard to get into lottery with cryptocurrency and win big. With lottery only luck plays the role.
Lottery is fair as long as the gambling site or the lottery station that you are playing with is legit . lottery has a different set of games and this differs their probability of wininning , the higher the number the higher the price that you can won but the odds are also high . the fairness also differ from one gambling site to another , this why op is asking if what lottery site is the best .