there should be the ability to make reinforcements flat rate or escalating on any board when you create a game - i much prefer flat rate - but nearly all boards are escalating reinforcements

Which means what?  Examples?

I guess he is talking about escalating value of cards ?

the designer of the board is in control of that aspect. typically they have the escalating cards so as not to end in a stalemate. many boards have rotating values or very slowly escalating values, there are a few that have a static value (like my Circles board).

To add to weathertop's comment.  Designer's put a lot of time and energy into tweaking this aspect of how a board plays in order to make for optimal game-play.  However, there are many boards that offer scenarios that let the creator of the game vary some of these parameters.