A program that grants points for using Bing search, which users can redeem for gift cards, sweepstakes entries, or charitable donations.
As a Microsoft Alumni I can attest that some of the processes there are completely dumb and most of the teams that manage different features (like rewards) that have access to similar technology don't always use the same functionality that another feature team will use for one reason or another, its usually up to the GM of them feature entirely. Does it suck for people with landllines, yes, do I see them changing it? Absolutely not.
In my opinion, I think their looking at the data as a whole and as many other posts you see about wanting to send codes to landlines, I promise you that number of people is SOOOOOOO MUCH smaller than the billions that have cell phones, and as many other tech giants, they develop for the masses and not the few. Do I think the reason they don't is because of security like the one person said, not really, maybe a little, but not the main reason.
In my opinion, the main reason comes down to the cost to keep that functionality for the feature just so a small group (and I mean small when I compare like thousands vs MILLIONS) as this is not an in house service, its done through a company that's whole business model is to send text like messages to landlines. This is becoming obsolete and I'm actually surprised ANY place is still using it. Its not practical business wise. Thats just my opinion and not speaking on behalf of the company.
I don't wanna go on and on about your rambling about what is more secure and your beef with cell phones (you assume because your wife had issues with stolen phones, and a few people you know have, that EVERYONE has that problem which you couldn't be more wrong. Most people secure their device with various ways of locking like biometric, pincode etc, you know, something you cannot do with landline lol) my point being you think Microsoft is reading all that? I promise you they are not lol.