So, these guys filed the paperwork and were running a corporation, rather than just a business partnership (you realize there's a difference)? Before they even had a business model? Again, that's ridiculous and a complete waste of resources at an early stage start up.
>"This sort of situation occurs all the time in small businesses and often leads to their demise."
Really? Do you have source for this assertion?
>"You are doing a great disservice to anyone who takes your advice."
Oh, spare me. You realize that these guys essentially followed what you recommend doing, and if it wasn't for the co-operation from minority shareholders would have been stuck with dead weight partners owning part of a business in which they did not participate. Establishing an equity arrangement before they knew what they hell was going on in the business was the cause of this problem. If there was no formal agreement, no partnership and in the end no business, none of this would have happened. The two founders would have moved from Dropcard to Ecquire, and the old co-founders would have no claim on the new product. Just as a reasonable person would expect.
But by all means, have people heed your advice, and form corporations before there's a business model, so that the shareholders have a claim on anything you do in the future. That's spectacular advice.