It is very good for the people to support the ETC. They will also support the ETH indirectly as the Ethereum Foundation has a lot of ETC to sell.
selling does not hurt ETC
ETC is strong becouse it has a marketcap and to have one you need buy and sell sweety.
and keep in mind there are 80 millions of ETC held by ETH holders. if those people would have wanted ETC to crash all of them would have sold there ETC but they didnt.
why do you think is that so ?
i guess those are the ones that didnt get a chance to vote befor the fork ?
not selling is a statement.
its up to you to interpret it .