Glad to hear you’re enjoying FMO! :D
Don’t be sorry, I gotcha and I totally feel you. Like I stated on the main page in the info section, the finished game will be around $5 (plus whatever tax itch has on top, though that depends on the country as far as I am aware), but I’ll do a giveaway as well (on Tumblr), as I always do to celebrate a full release, so there will be a chance to win a few keys there.