For the last 1 year or so, I have been buying deals cautiously observing the ethics level of the founders by doing a basic level of due diligence by checking their LinkedIn, their speed of response on the questions section on Appsumo, etc.
I noticed that Gil (the founder) had a great track record,
so I cautiously bought Tier 4 & upgraded it to Tier 5 after observing the product & the support system.

He & Bryan are a team of one of the most authentic founders I ever saw on AppSumo - yet.

like Gil (the Technical founder) is so interested in making sure that the buyers actually use the product. He really wants the Lifetime deal holders also to get the value for their money & actually use the product. He takes regular user feedback to upgrade the product consistently, sends at regular emails about the product updates
He is very simple, genuine and authentic.

On the other hand Bryan (the founder), is a YouTube & Scriptwriting expert, he is so active in making tutorials, taking live support classes regularly, answering questions in real time, giving free advice (despite being a paid consultant) & giving free scriptwriting courses/classes.

I mean these guys are totally crazy (in a wonderful way) & really overdeliver (even to the Sumolings)
which is really rare, as per me : ) but I might be wrong

The support these guys provide is unlike anything I have seen in any lifetime‑deal I bought on AppSumo, yet. So hats off to these guys.