The unique cases of freebitco.in :
1. They are not showing any clickbait advertiements even they make us to visit them every hour.
2. I guess only gambling house which allows its users to withdraw without playing a single roll and without any deposits.
3. Other houses started adding options to play even with stablecoins after altcoins but they are sticking with ONLY bitcoins.
4. Afflicate program applicable even with faucet claiming.
5. Lots of other rewards like daily interests for the balances and redeemable reward points.
FreeBitcoin succeeded for the obvious reason - first mover advantage. Except that, there is nothing extra-ordinary with FreeBitcoin. It was started merely as a faucet.
1. It is wrong to assume that they didn't do advertisement. Earlier FreeBitcoin had an option of banner advertisement charging fixed rate ($0.10 I guess for thousand views on banner).
2. There are many gambling sites which pay their users even when users are able to reach minimum withdrawal threshold with faucet winnings without depositing anything.
3. Well, that's drawback, not benefit.
4. Affiliate Program used to be great attraction on FreeBitcoin in its early days, especially due to the option of referral commission back. People were paying 80-90% back to their referrals. That was one of the major reason for the success of FreeBitcoin during 2013-16. But not now isn't very relevant.
5. Yeah! That's something unique. But it was introduced only after FreeBitcoin became big name in industry and had huge bankroll.
Purpose of this topic :
It may trigger some ideas to business people who are right now hunting for concepts for their upcoming gambling business.
You will get very less traction if you follow the concept of FreeBitcoin in 2020. Now people are striving for whole new level of gambling experience like nice UI, multiplayer games, offers, bonuses, etc etc. Following and studying FreeBitcoin won't help.