I don't understand the "making it harder" part. I'm not saying it can't/work, because I just don't know. But it does seem like playing games to me, which is almost always destined to fail. Why not tell just tell them that if you're serious, here are my requirements. They either meet them or they don't.
Well here is another way of looking at it, if you have a WAS and they are not making it easy on you, in fact they are playing very hard to get, impossible in some cases, does that make you quit or does that make you work even harder to try and get them back?
Read most of the situations on this forum and this seems to be reality in most cases.
So it's not so much a game but reality, we tend to place higher value on things that are hard to get/acquire.
If you could step outside your house, reach into your flowerbed and scoop up hundreds of perfect 1 carat diamonds, and every one of your neighbors could also do the same thing, do you think diamonds would be that expensive to purchase? No, obviously not.
We attribute the concept of value to everything, some things have little to no value, and some things have very high value.
We pursue what we don't have, we take for granted what we do have.
It's not playing games, it's just human nature - accept this as reality because it is what it is.