> If an investor would rather own 5% of a $20m company than 3.3% of a $30m company
It's not that simple because you're not factoring for time. Yes, both of those stakes are worth $1m, but the risk levels taken by an investor are different. For example, would you rather own 5% of Amazon when it was worth $20m, or 0.01% when it's worth $10b? Those are both $1m stakes if you ignore time, but the latter would've been worth much less than the former.
Here's a concrete example using https://angelcalc.com/model
Priced round
I invest $1m at a $10m post, owning 10%.
- If your next round is $5m at $20m pre, I'll own 8% (post-dilution) which will be worth $2m.
- If your next round is $10m at $40m pre, I'll own 8% which will be worth $4m.
If your valuation doubles, so does the value of my investment, and I keep an 8% take in either case.
Uncapped note
I invest $1m on an uncapped note, 20% discount.
- If your next round is $5m at a $20m pre, I own $1.25m (5%).
- If your next round is $10m at a $40m pre, I own $1.25m (2.5%).
Note that 1) my upside is capped to $1.25m (that's the 20% discount I got) and 2) the better your next round, the lower my ownership.
Closing thoughts
The reason the uncapped note is even more unattractive is that most companies have some perceived ideal outcome. Let's say it's a max $2b exit for this specific company. For a priced round, I own 8% of a company that could go up to $2b in value. For an uncapped note, I own 5% if you raise at a $20m pre, or 2.5% if you raise at a $40m pre. Note that the better you do, the lower my percentage, and hence the lower my potential upside. If you raise at a $20m pre my stake might be worth $2b x 5% = $100m someday. If you raise at $40m pre my stake might be worth $2b x 2.5% = $50m someday. If you really knock it out of the ball park and raise $20m on an $80m pre for your Series A, my max upside is $25m. Again, this makes no sense because I invested $1m at the exact same time in both the priced round and the uncapped note round, but in the priced round instance I own 8%, while in the uncapped round I probably own much less, and the better you do on your way to a $2b exit, the worse I do. That's a strong misalignment and there's no way for me to make that pie bigger.