The context is pretty simple. X offers a product for sale and makes a representation that the purchase price includes free tech support for "the lifespan of the purchased major version." The purchased major version is 3. X may be donating all his revenue to a charity or offering other products for free, but that doesn't change the terms of the purchase contract; and a new customer should not be required to read all the posts in the support forum to make sure support is actually what was advertised.
Again, I am having this discussion with you as a matter of principle, because the money involved is relatively small and not worth arguing over. You appear to be a straight shooter and speak your mind without a filter. I am the same. I will tell you if I believe your position is wrong. I will also tell you when you are right. On this issue, I believe your position is objectively unreasonable.