I agree. The landing page isn't the nicest one. I'm not a designer, though, and I'd rather spend that time improving the product. Is there anything you'd like to see in the extension that'd convince you to pay for it? Happy to improve!
At the same time, you're targeting this product towards customers who are already developer-oriented — a crowd that is familiar with, or can easily recognize, the same technologies you've used to build Monito. Tweaking the designs to have a more custom flair so it doesn't seem so copy and paste, avoiding the same icons for multiple figures, and especially lowering your price are all things that would probably help with early and continued adoption IMO.
As for things you could include to justify the existing price, I really don't know. There's a heavy difference between paying for a desktop-application license vs a browser extension.
We'll see about the price. So far, it sells ok. I'd rather focus on improving the quality and adding useful features.
Regarding the icons, I've just noticed and fixed that, thank you!
Different pricing scheme, at least in the beginning. While $39 (or even $59) is acceptable as one time payment, I am not sure if I am willing to pay this for a product that's been on the market for only 3 weeks and whose future is unknown. Charging something like $1-$2 per month will earn you more in the long term and will provide a safer option for the customers (they won't loose too much if you disappear in a couple of months).
BTW, at the organization where I work, we can only make payments to established entities, i.e. someone who has address, account number and can issue an invoice. I guess Gumroad, as a middle party, can provide all of these, still it would add to your credibility if you had an "About" page with the necessary data. Oh and a Privacy Policy would be nice too - some organizations won't allow installing any extensions that are not reviewed by a security team and such reviews often involve checking privacy policies.
About pricing, I don't think that model would be better. As a solo developer, it's better to charge more and provide better support to fewer customers. I'm not saying no, but it seems to be working well for now. Thank you for the suggestions!