Another workaround if you're not willing to KYC and use Binance Pay is to use Okex.com. Send whatever coin you want to pay with to the exchange, trade it for BTC, withdraw it through the lightning network, and then pay your Coinsbee invoice using LN as well. I believe Okex has all the altcoins supported by CoinGate, except for the Binance's coins.
Good idea, thanks! I also don't see much advantage in using Binance Pay. If you want to verify with Binance via KYC anyway, you might as well use the Binance credit card and earn cash back on their platform. If you have enough BNB, the cash back is much higher than what you get on Bitrefill or Coinsbee.
I will try the workaround via Okex.com when I have some free time. I am using BTC or some major alts most of the time anyway. So it's not really an issue.
(I am OOM as always, will merit your posts once I get some!)