A wage increase of over 10% every few months doesn't sound so bad. I don't suppose it was a regular thing?
This only works if, and because, you are ready to walk away. It's the easiest form of negotiating. But it does require you to actually be able to walk away!
Aren't we all adults and know this is how this game is played ?
This is not a success story - it only worked because I was an incredibly poor negotiator and signed on for at least 20% under my market value.