Paid subscriber who never used my SaaS cancelled after 4 months

One of the more weird customer situations... Signs up in Nov, the $10 paid subscription activated in Dec, never wrote a post, doesn't reply when emailed to, then now 4 months later, abruptly cancels. πŸ€·β€β™‚οΈ

I never added his 4 months payment to MRR from the beginning as suspected this will happen. Just didn't expect it will take this long... 😨