Hope to see them provide a guide to check the fairness too. I'm not seeing it very easy actaully. I have read some guide how to check but it took me hours to come up after folowing a very complex instruction and in the end its still not a guaranteed verified information since they can randomly change the things on the server side.
Different for each site, but the good ones will hopefully have the functions that you can fit your parameters (of server seed, nonce and client seed) into, to verify that the result on the site corresponded with the mathematical result.
The whole reason for using it is so that you can rigorously confirm the validity of each bet. If you're having trouble with that, isn't it a good idea to simply stop betting? After all, you wouldn't play craps with a pair of dice that someone decided to bring in on their own -- you would want to
verify...
Don't trust, verify.