There is no $166 plan. The least expensive $500/month plan is "only" 7.5M requests per month.
50M requests under the ultra plan (7.5M requests and then $0.001 for each one after) would cost $43k/month - and it would be more sensible to go to the "mega" plan then which is $10k/month for 150M API calls.
He's got a sweetheart deal.
https://api.imgur.com/#commercial takes us to https://rapidapi.com/imgur/api/imgur-9/pricing
There is no $166 plan. The least expensive $500/month plan is "only" 7.5M requests per month.
50M requests under the ultra plan (7.5M requests and then $0.001 for each one after) would cost $43k/month - and it would be more sensible to go to the "mega" plan then which is $10k/month for 150M API calls.