Good Harvest Organic Farm review for Gleam Competitions

I had been persisting with trying to use this app on the free plan but after much consideration ended up going to the Pro plan. $49USD a month seemed manageable. I then got notification that they had authorised a $5000 a month spending limit on the app on my shopify. What the HELL? There is no way I would authorise that much spending limit on the app. This feels super scammy - i've since requested account deletion and taken other steps to ensure I am not charged that much but what kind of app needs that level of account charges authorised?? The plans are super confusing and it costs way too much for any kind of useful app features. EDIT: Developers came back to me very quickly to refund the $49 charge and cancel our account. Something to do with their set up/billing system?