I suppose tribes and especially general content tribes weren't meant to have such high prices. Just thinking about it, aren't general content tribes basically a clone of Hive with different token economics?
The concept of cross-posting is needed in my opinion because some content really does concern multiple communities but the execution as it is now feels a little off. To be fair, I can't think of a much better solution. They all have trade-offs.
Well, I can't complain about prices... but I think that this situation is due to the users, they set the price right?
Yes, you're right that it ultimately comes down to the users to set the price although as we see with POB, it is really just a few big users that matter when it comes to price.
It is the same for all the tokens and even Hive. A few big accounts make up for most of the buying and selling.