Don't Ask For Her Number; Give Her Yours

I have seen this advice given recently and to me it makes sense. You give her your number (on paper not by phone) and say "contact me if you want to get together"... and that's IT. Reasons it makes sense:

- It's a great gauge of interest. If she never gets back to you, you've avoided wasting time and possibly money. In this day and age a man only has enough of both to spend on a woman who is really and truly interested.

- It increases her comfort level. If she's not interested, she doesn't have to actively reject you on the spot (unless she refuses to take your number) or know you're another guy who will be blowing up her phone that she has to ignore or eventually block. There are so many thirsty stalker types out there that this low risk (to her) approach is appealing.

- Maybe most importantly: it communicates outcome independence and, ironically, keeps you in the control (non neediness) frame by not asking her for anything. You're saying, here's an opportunity to spend more time with me; if that's appealing to you, great and if not that's cool too and you'll never hear from me again.

You're thinking, that's crazy, she'll never call me back. But what if she does? Then she's invested and you know you can move forward with confidence.

What are others thoughts on this, have you tried it, and does it work?