Tragically, Roger Tsien has passed away.
Roger was brilliant even among Nobel Prize-winners, and that he offered Prasher a position is a testament to his kindness and modesty (as Roger did more to make GFP the ubiquitous and usable tool it is now than did everyone else put together). I had heard him describe the unfairness of the situation years before, lamenting that Prasher had never received proper credit for his key contributions.
It was not the press attention on Prasher that made the difference to Roger. Rather, I suspect that Roger felt that it was only a fitting way to use the prize money or share the press attention directed at him.
Now that Roger is gone, I do not know what Prasher’s situation is. But it underlines how important support can be.