They sell ibuprofen with acetaminophen at the pharmacy, off the shelf, so that’s not an issue.
It is recommended to alternate between the two so that you are always under the effect of either one and it reduces the pain throughout the day, instead of having big spikes of pain/no-pain.
VC funding is basically gambling, trying to find the next billion dollar company. So they throw money at anything that has any semblance of traction to get in early and cash out when the time comes.