The market is tight, but nowhere near the point where it was 4-5 years ago. Big cloud providers already bought enormous amounts of IPv4 while many regional ISPs and colocation providers went out of business.
There is no real pressure to buy IPv4 except for brand-new companies to get their initial /24 or /23 to start. Everything else is optional.
It cannot be used commercially and should be in the ‘spirit’ of amateur radio. Unfortunately there’s also a bit of a backlog it seems (a couple of months) right now.
They also offer simpler ‘turn-key’ wireguard tunnels too for things like Web SDR setups.
For BGP direct announce in practice it seems to be in the spirt of non-commercial ‘self learning and experimentation’ which is what a lot of legislatures around the world do use as their base definition for the ‘amateur’ in amateur radio. So I guess much like having slices of radio frequencies reserved for it, we’re lucky there are slices of address space reserved for this.