Oh no, how am I ever going to avoid giving my custom to someone who has allegedly cornered the market on - checks notes - a db proxy? Give me a break.
I can think of at least 4 other ways of scaling horizontally without switching DB engines. I'd have to be mightily constrained to have this particular product as the only option.
Sure, I don't doubt your ability to do so yourself. I just question your ability to trust some random unknown figure with your data if you have enough scale. That's quite different, actually.
TBF, I hadn't heard of the guy before this thread either, but I don't hang out in the unexpected-scaling-demand-with-no-infra-team circles, which appears to he the target market.
If you have such luxuries, I bet you don't have enough scale to be really profitable for him.