even though with profit i didn't felt house edge is 50% of PD.
Also initially there were wins but suddenly behavior got changed which i din't like, it should be stable.
House edge affects your chance to win a bet, but the result is still random.
It is like in tossing a coin, even if the chance is 50-50, you don't expect to see "HTHTHTHTHTHTHTHTHTHTHT".
With a 1% edge on PD, you will have 49.5% chance to win a x2 bet.
With a 0.5% edge on SafeDice, you will have 49.75% chance to win a x2 bet.
But, you may or may not win more in SafeDice. It still depends on your luck.