There isn't millions to be made from Alex's idea, so the idea that someone would throw millions at it to obliterate Alex's position in the market isn't relevant. Alex has a niche offering, which is why the comparison to THM's player database is relevant.
Also, THM gets significantly more unique daily visitors than blondepoker, and like I said I'm sure this is due largely to the player database.
Oh ok bud, well you obv know what the idea is so are in a much better spot to offer advice. Not sure why you introduced the e-bay example if it isn't relevant but sure thing, if the offering is niche and not going to make big bucks obv no need to protect it as nobody will be interested in copying it.