Honestly, the question should not be "Would you be interested in an auction option?" More so, "If we give you an auction option, what would you like to see and why?" No one is going to be forced to use the auction feature.
This is an opportunity to give buyers/sellers more options, potentially create a safer auction marketplace for pins versus eBay, and it could be a positive revenue stream for Pinside, which keeps the lights on now and into the future.