It would be very attractive to drive the oil companies out of business with a frontal assault.
Of course it would depend on having enough consumers prepared to pay more for their fuel.
Basically, you don't actually buy power from Bullfrog— you continue to pay your existing utility bill, and then pay a surcharge to Bullfrog, who invest it in green energy projects on your behalf. They're periodically audited to demonstrate that the money is doing what they say it is, but at its core it's a marketing company selling feelings, not an energy company selling energy:
https://www.huffingtonpost.ca/david-dodge/bullfrog-power-can...
But the point is, they have loads of customers, so there's definitely an appetite out there for paying more to get reduced-guilt energy.
If you're serious about this, I'd recommend reading Max Gergel's book "Excuse me sir, would you like to buy a kilo of isopropyl bromide", and then imagine what you would need to go through in order to start an operation 10x to 100x bigger than Gergel's in todays regulatory regime.
The way I see it, you're somewhat in a different ballgame since you're not buying explosive/toxic gases from anyone else. You're producing an explosive gas from seawater. Still, I imagine you need some pretty big safety zones if you're operating at scale, no?
I'd like to see environmentally aware consumers voluntarily subsidising a synthetic fuel company that would compete with the fossil fuel companies.
If enough people would chip in, perhaps it could be possible to put pressure on the margins of the fossil fuel companies and drive them out of business.