Corbett's compensation is great for shareholders
Based on the most recent prospectus, Corbett's salary was $49k in 2019. I haven't found any data for 2020. The boost is justified in my view given the market cap increase and new funding. He is also the interim CFO, so he's got additional responsibilities, at least for a short period. I would consider the boost partly a form of catch-up compensation for prior services rendered although it wouldn't be explicitly stated as such.
With respect to the warrants, they have a 5 year duration. They were struck just slightly above the most recent funding round (investors bought shares effectively at $0.23 I believe). I think this is a great signal to investors that management is here to create value well above recent prices.
The warrants can also be exercised on a cashless basis. This means Corbett would forfeit a certain portion of the warrants to cover the exercise price (so he doesn't have to actually pay cash to get the shares). This creates additional incentive to get the stock price well above the exercise price to minimize the forfeiture (ie. shares that he will have to give up to cover the cost of exercise). It's a win-win for shareholders in my view.
"In lieu of cash exercising this Warrant, the Holder may elect to receive Common Stock equal to the value of this Warrant (or the portionthereof being canceled) by surrender of this Warrant "
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