For sure. Took him years and quite a bit of money to develop it. He put his heart and soul into it and has a nice thing to show for.
Yes, $40 a month might be steep for some people, that's why i said, he's not looking for any audience, but the audience who will appreciate and use it
Serious audiences also need some Trials to try all the features in the tool, I am sure that by giving a Trial of a few days (maybe 3 days)
it can attract the interest of many audiences, and of course there will be more who are interested.
For example, you also market it as well as give giveaways on this forum with some questions or something like that and of course you will get more exposure from real users.
It takes more marketing for a tool like this so that more people know and how good it is.