Most likely they just came up with the same idea at the same time. Although they obviously missed the gamification part. Apart from education, the only reward they offer is "contribution to science", which does not sound that exciting to me.
In any case, I would like to keep in mind that antibiotics are not a thing on itself. The main reason for needing to find new ones, is because of misuse. Which links BioStrike to our intensive industrialized meat farming culture. These political and societal issues need as much attention as the technology or science. It is another piece of evidence that our current societal model is based on 19th century, linear, top down, fossil based, corrupt and learning-through-crises methodologies. Screening for new antibiotics is for me also about countering this living dinosaur system as well. This starts with awareness and a sense of ownership, which works very well through hands-on workshop and experience. So that's what I'd envision BioStrike to achieve. Rather than feeding the BioStrike results into the old already broken system, it's much more interesting to see to what extend we can create a new infrastructure based on more modern values as bottom up, circular, open, ever-learning and sense of responsibility. And let's not forget that most people on this planet live somewhere around or between India, China and Indonesia, so including them is vital considering their potential antibiotic use once their middle-class comes up to speed. Big pharma got out of antibiotics not just because of technological challenges, rather they are part of the old system and not fit for fixing the challenges of modern times.