Users will lose what they non-bought eventually if they don't own it. It's just a matter of time.
Even if the company earnestly believes, at this time, that they will continue to provide access forever, circumstances will inevitably change in the future and might cause a change of plans. Or the company might be acquired by another with different ideas, or bring in new management that decides to refocus on different business opportunities. Or the technology they use to lock down the product will fall out of support. Or they just go out of business. Something will inevitably happen, and users will lose access.
Even if the company earnestly believes, at this time, that they will continue to provide access forever, circumstances will inevitably change in the future and might cause a change of plans. Or the company might be acquired by another with different ideas, or bring in new management that decides to refocus on different business opportunities. Or the technology they use to lock down the product will fall out of support. Or they just go out of business. Something will inevitably happen, and users will lose access.