Yes, very low, that's why the site makes lots of money. Do you find any higher odds BTC sportbooks? Let's bet on other higher odds site.
nope, all of the btc books have scam in-play odds except for Nitrogen. But, Nitrogen is still testing their live betting service.
Don't use in-play at cloudbet or directbet or anonibet for Baseball, Basketball, American Football.
Yes, some other guys complaint before, most of those sites are greedy, they have very low odds, nice to see nitrogen is a good and fair one.
You can see it: https://bitcointalksearch.org/topic/m.11090311
This guys post a lot of low odds proofs: https://bitcointalksearch.org/user/ts11111-343624