To integrate with a payment provider outside of what Glide provide, you’re likely going to want multi-step zaps. I built my integration on the free trial and soon realised that it was very costly with the Zapier tiers. So now I use Integromat, it’s a much better service and there are more affordable options.
I now have my customers managing their recurring payment subscriptions from inside the app via webhooks, and everything coming back to Gsheets! It’s not perfect, but works pretty well!