Easiest but not the best way,we are looking for best way.
It is the easiest and the best way too.
Some people don't see it because it is difficult to get a faulty impression that it is +EV while other strategies might confuse the player into thinking so.
The less the house edge the better. and more promos the better.
AFAIK, there are Moneypot apps with 0.1% edge (not sure if it still is applicable for 1 BTC bets). There are also other sites like Rollin which offers less than 1% edge depending on levels and also running wagering competitions.