I was an early adopter, and very nearly stumped up the £40 for the upgrade on the software, but being a tight wad I decided against it..... fortunately, but obviously at 99p that was a different story.
But I do think Parrot have been very unfair to the early adopters, they should, in some way, try and even things out, even if its just to offer a voucher against future purchases, anything is better than a kick in the nuts, which is what it must feel like, especially when you are talking about the cost of an additional battery, which I did stump up for at full price.
Maybe worth everyone bombarding Parrot Customer Services with a protest email...... You never know till you try.