Adding aspirin and trimming suckers on tomato plants. (May-June/2024) 

I do not think this is a valid experiment if it stopped here. You observed either no at this stage or less tomatoes comparatively. But I've seen a high nitrogen fertilizer vs a more balanced fertilizer result in a very unequal amount of tomatoes despite the earlier observed fruiting stage for the balanced. That observation was such a shocker that I can't forget how the early appearances lied. Flowers and thus tomatoes came on earlier, but overall the results weighed less for those plants at the end of the year. Old school prepper urine vs mg tests is worth a watch and is what I'm referencing. This aspirin test also needs to make it a year imo and the tomato's weight needs to be kept.