why on earth should a solo-miner pay someone any fee, what he can get for free @127.0.0.1 ?
And even, if he got it for 0%, why should a solo-miner risk his reward, if the "solo-pool" is beeing attacked?
The benefits of mining here over true solo mining are explained clearly in the top post and the website. If you don't wish to take advantage of those benefits for a measly 0.5% fee and risk mining one solo block in your life that ends up being orphaned, then that's your choice.