Seeking Feedback: One-Time Fee or Monthly Subscription for My SaaS Pricing?

Hey Indie Hackers community! I'm grateful for your time.

My SaaS offers tools like company-to-URL, URL-to-email, and email validation. Each action is a "job," with a free version allowing 10 jobs.

Here is the pricing: https://matchkraft.com/pricing/

So, I created 3 packages (one time fee):

• 7 days packages .- 7 days unlimited jobs (10 USD)
• 1 month package .- 1 month unlimited jobs (15 USD)
• 1 year package.- 1 year unlimited jovs (99 USD)

My concern? My model doesn't follow the typical MRR pattern since it's all one-time fees—no subscriptions. Should I switch to monthly subscriptions? Your advice on whether my strategy works would be greatly appreciated. Thanks!