Exactly. So stop claiming that your oh so holy SSL certificate means that we can trust you 100%.
This is just claims. There is nothing that can be done to 100% verify it, this is pretty much as close as we'll ever get, but, once again, claims are not a good way to decide on whether to trust a person.
If you are going to keep pressing this, at least look at the motives. What could Rub possibly gain out of posessing 20 Blockland keys if all the servers on the first node sold? Literally the worst case scenario is he goes onto each key individually in-game, does something very malicious to severs repeatedly, and gets them deactivated. Great. But Lub doesn't gain anything from this, all that happens is his customers each "lose $20" should they have to buy another key and his service is halted. On the other hand, he could continue providing a reliable service and making a profit (right?), however small it may be.
This is the same reason, although on a smaller scale, that online transaction companies don't use your credit card.
