How are you going to survive? I could build this in a weekend and be profitable charging a quarter of the price. If this catches on I imagine someone will do just that.
potentially, but the vast majority also offer some benefit to staying with them. i.e. your friends are there, user incentives to promote growth crediting you to keep using the system, some form of retention. Here there is none and the price is outrageous for what is being done.
Anyone willing to put in the work to create a serious clone product and talented enough to succeed at it probably has ideas of their own they'd want to implement instead.