here's what the WGT news page says:
Compete in this 18-hole stroke play tournament, and for any birdie that you get and tweet about using the hashtag #AllianzBirdies on Twitter, Allianz will donate $1 to Junior Achievement.
Play as often as you want to post your best score (and make the most birdies) now thru 2/15/15, for your share of the 200,000 WGT Credit purse.
It says "any" not "every" so it's still not too clear. But, there is a nice purse available, though I won't be getting any of it :-( . My local Internet cafe is closed until Feb 9th.