Strange thread ! Welcome to capitalism guys, you know this system where people invest their skills, time and money to build what we call a company, take risks, get success or not, and have the right to sell their assets to anyone willing to pay the price. Nothing new here. Fx owners decided to sell to Roli, good for them. In the same way, Camel Audio was sold to Apple, while it was one of the most respected audio company around, and no one complain. I have been screwed, like many others, by Abbey Road when they stopped their product line just before the move to 64 bits, but that's ok, I mean thats life. If you would have listed few years ago the so called fair and reliable companies where "you can trust and purchase" as someone mentioned (!!!), you would have included Fxpansion, Camel Audio, Abbey Road, URS, etc...They are no longer in the business or still there but with new orientation. That's life, like it or not, that's reality, so you can keep on whining and complaining, it will not change anything. By the way, where is coming from this strange idea that when you purchase a plugin, you are entitled to get support for ever, or that it would give you the right to become a kind of shareholder of the company ! You've got what you paid for at the moment you made your purchase, with the specs listed at that time. I have many plugins that are no longer supported and I still use them, and anyway even if they would be supported, new players, new technology and new products make them quickly obsolete.
May be you can set your own company and start to code your own products if you are not happy with this situation, but loosing your time to set the list of respectable companies is ridiculous imho.