This does not match my experience with my App, Nikola. I've been able to match up the transactions and refunds as 1 to 1, price-wise.
Great website, by the way!
Out of curiosity, can you say whether Tesla has approached you for acquisition?
In my data right now I see a few examples of an $80 purchase match to $56 in proceeds (70%) matched to $56 of a refund.
I can't say I think the 30% fee is appropriate anymore, but this particular case being made about refunds does not appear to be accurate for me at least.
The group think on here always reaches a fever pitch when it comes to Apple - HN is particularly susceptible to it