So as for my knowledge no VPN provider 'gives' a routable V6 range to the end user. The WAN IPv6 you get is the IPv6 of the VPN server.
The GUA is globally routable and reachable in the IPv6 Internet.
As for ULA, yes a unique local V6 address is allocated to each client's tun0 network interface for the US servers that support V6.
As for trial periods, we currently have an awesome discount for Hivians - plug this in for 25% off monthly plans exclusively for Hive: ARIA25Mon-Xwa7VPN :)
RE: AriaVPN introduction to the Hive Community