Your concerns appear unwarranted, considering payments are made to farmers, even if no new uploads are made. Moreover, the chance of no uploads being made is highly unlikely, due to historic precedence.
You may be trying to get people to see the bigger picture, but what you are achieving is demonstrating your own inability to see it.
The cost for a PUT and the reward for a GET are disconnected from new money entering the ecosystem - new money enters when Safecoin are purchased, not spent. This gives value to what farmers can sell GET rewards for. However, new value is added to the network whenever useful content is published (PUTs), which then encourages GETs from others in the future. So, the correlation is not direct on any of these fronts; the market price for Safecoin vs when Safecoin are spent (PUT) vs when farmers are awarded (GET) are only indirectly linked. In short, you can’t say “new money comes in by people storing new data”, as new data may have no correlation to the Safecoin price. Once again, using a flawed premise to then beat Safe Net with is a straw man argument (FUD).
You say there is no business model which is sustained by people selling new data? Nonsense. Artists, engineers, scientists, etc, all create new data which is valuable every day. Moreover, there are myriad people who indirectly make a living from this process, adding value as they do (project managers, company directors, producers, support staff, sales teams, etc). Moreover, this data is not temporal; it is persistent. Any of the data produced is likely to be savoured, saved, built upon, re-discovered, ultimately knitting the tapestry of our history.
To invert your question, why should a musician who creates a song once, then pay a rent to have it digitally saved somewhere? Why wouldn’t he record it once, store it once, just as a sculptor creates a statue and then stores it persistently in their garden? What is this obsession with refusing to acknowledge that people like to have ownership of something, rather than relinquishing ownership and having to pay rent on it? People wanted their own hard drives, disks, USB sticks, etc, long before cloud storage came along and I am sure many feel far more comfortable with this model too.