我可以使用多个vpn盾牌优惠券，以保存我的vpn订阅吗？
for most cases, only 1 coupon can be used for each new vpn shield subscription. the vpn shield checkout page doesn't usually allow more than 1 code to be applied at the same time.
i tested over 100 vpns for this article, and some of those were free services. unfortunately, i cannot recommend any of those. most could not bypass bbc iplayer's vpn detection technology, and the few that could gave me speeds that were too slow for streaming or limited my bandwidth so i couldn't even stream an entire episode of a show.