Are the coins that are currently mineable on the betanet worthless then?
Exactly.
This was a question、rather than a statement。 so these coins Ive mined on the beta still are worthless?
Yes. They are 100% worthless. All the information you need is written on their website. You should try reading more often vs. nagging others.
Source: I clicked my mouse 2 times and read it on their website.