Not renewing contracts with skateboarders who are not relevant anymore and who don't help you sell the product you are endorsing them to sell is not "fucking someone over" it's called "good business practices". Being a pro skateboarder is a job kids, if you aren't cutting it at your job you get fired, especially these days when companies are hurting and new kids are coming up. Sinclair cut his own homie Dan Murphy who in my opinion should've never been put on Foundation in the first place as he never helped the brand, so I doubt it was anything personal. Business is business, if you don't like it skate for fun and don't expect anything out of it and you'll be fine. Foundation had it's time back in the 'Art Bars' days and Sinclair wouldn't be doing his job if he wasnt constantly trying to get it back to where it once was, I'm not even saying that's possible but he's obviously trying...
Richie is sticking up for his boy, nothing wrong with that either I would probably do the same in his position. However he's lying to himself if he thinks Sierra was doing anything to help Foundation anymore by being a paid professional skateboarder. Truth hurts sometimes, I wish all parties the best. I hope Sierra still enjoys skateboarding and perhaps finds a new sponsor that better suits him and I hope Foundation can one day get back to where it once was, let me tell you they've got a lot more to do than cutting Sierra and Murphy though...