I think that they should be paying us to teach their AI.
I'm a native speaker of English but tend to write sentences that are overly complicated. I tried Paperpal to see whether it could help. The brief answer was "no". it has a VERY poor knowledge of English grammar. Most seriously, it FREQUENTLY introduced errors of number (--for instance, changing a phrase like, "he needs to know..." to "he need to know." Paperpal has a LONG way to go before they should be charging people for their services.