I have tried it and it works. It is not as good as a dedicated drier and not as energy efficient.
The worst filament was some 5 y old pla that was so brittle it snapped when unrolling from the spool, that just couldn’t be fixed on the heated bed. I had to dry it at 50°C for 12h to be usable again.
It is. In Germany it’s pretty common to have little plastic Keychains or coins to use instead of money.