You seem to be under the illusion that your money matters to Plarium. It doesn't. You're a small fish in a very, very deep pool.
Their business model is set up to drain new players of as much money as possible before they quit, while providing enough chum for the bigger wallets to continue playing and spending. You represent the kind of player they quietly wish would stop making noise - people like us, who don't spend and continue to be vocal about our dissatisfaction with certain parts of the game.
When you look at just how much money the top-end spenders actually spend - we're talking in the hundreds of thousands of dollars, sometimes even into the millions. I've seen screenshots of accounts with 50+ +4'd lego champs. Quinn's latest champ chase tourney had people spending 1000+ ancients - not because they needed the champ rewards, but just because they can.
So, to answer your specific question - how much? Zero. Because they won't offer those things to you, for any (reasonable) amount of money.