MacPaw's Setapp service gives instant access to a large number of different apps for a fixed monthly fee, but the company allows you to test the service prior to committing to the subscription. Just sign up for Setapp, and you will automatically start a 30-day free trial of the service.
You'll have the same full access to all the features Setapp provides a paying customer. And if you want more free months, just share your experience by inviting friends. You'll get one month of free service for every friend that signs up using your referral link, up to a maximum of six months.