After game you can verify that client seed and server seed are not changed.
I don't know that seeds are not changed because I don't see secret server seed before I place bet.
Look, I opened site and changed client seed and server seed hash is visible before first bet was placed (you can see chips, I didn't place any bet yet):

And after that round I got this result:

I didn't check results, but visually this should be ok. Now, I changed client seed again:

And I don't see server seed hash.
After placing bet (you can see the cards under provably fair tab), server seed hash is revealed:

That is not how provably fair is supposed to work and this leaves some space for manipulation.
If player can't see server seed hash before they place bet then it is not provably fair, it is simple as that.
Also, client seed always change, so player has to type seed every time. This is not good in my opinion.
EDIT; I've not deposited BTC yet so can't see but when I'm on the FUN currency it shows above the cards what the max bet is, it is not the same for BTC?

Huh?
Bet limits are:
BTC 0.00001 - 0.2 btc
DASH 0.0001 - 10 Dash
LTC 0.0001 - 10 LTC
I suppose FaQ doesn't show correct bet limit, or?