That’s because your mobile plans are usually different and you get charged for each SMS, while SMS is typically included for free in mobile plans in the US. Since you have to pay per SMS, people instead use WhatsApp and Signal which don’t have a per message charge.
Capture One fan here. Good software buy they are also pushing towards subscriptions although you still have the option to buy and get support for one year as well. Affinity Photo is similar to Photoshop and had a great price, but has less tutorials out there.