Wow, nice support! Thank you for speedy response. :)
The license is still revocable without much detail on why so that is a worry for me - even if you plan to do nothing with it it means I can't use the asset without the concern that I could be blocked from using it even in a finished project in the future. I hope you will consider using a more standard permissive license template, but of course it is completely up to you how you sell them! I do think you could get even more sales with more clear terms.