The strikethroughs are for services I once used, but have since cancelled because I either moved to another service or no longer needed that service anymore. Early on, I paid for Code Climate, but realized it was an expensive non-necessity at the time. For services like Mailchimp, I moved my newsletter to Intercom once the spiked cost of Mailchimp didn't make sense to keep.
The decision to cancel Baremetrics is a long story, but the main reason is that I don't agree with a few tactics they've used to improve MRR, like removing the ability for users to cancel their account on their own (you now need to email them). I'd rather make a little less in order to improve the user experience and build a better relationship with users. I use ChartMogul now, which I really enjoy using.