I saw that from Frontiers ... and considering most of their output is shit, I can easily be convinced that their business practices are shit too.
I feel deja vu here and am seeing visions of Scarlett Johansen in my peripheral vision, but if, big if, but IF, the contract says what Frontiers says it does, this isn't about shitty business practices, it's about a grown man making a decision then backing out on it to someone else's detriment, then crying butthurt when he doesn't get his way. It's not the '60s anymore; if a contract says "you will be exclusive to us", that's what it means. EXCLUSIVE. Excluding all others.
Granted I don't know Dino from the guy who plows my driveway (that would be me) but still, this doesn't sound like shitty business practices, it sounds more like a couple of children who need their mom to stop this car. I read the two postings above, and it's clear the second was written by someone with a moderately objective (that is, unemotional) take on things, whereas the first one might as well have been written in crayon.