Long term doesnt mean you play / roll there for hours a day. As long as you keep playing regularly on the site like you have mentioned, it is long term play already.
Then add the reward points, golden tickets, referral commissions, free rolls and bonuses and you'll find we are very competitive against the 'low house edge' sites.
1 RP equal to 1 satoshi and they are giving free 1 RP for each 500 satoshi wager
You can consider this as some kind of rakeback so for each average 500 satoshi wager , you will lose around 25 satoshi( Average ) if the house edge is 5% and you will get 1 satoshi rakeback
Sounds generous? No but atleast it is something and definitely not competitive low edge site compared with the others