I don't think that letting people who are interested in Tezos know about a coin with very similar features is "pumping" the currency. Tezos has some really interesting features, but they have stumbled with the ICO and delayed their release. As someone who was waiting for Tezos to launch I was excited to hear about Cardano and I'm sure there are other Tezos enthusiasts here who are happy to learn about the existence of similar coin. To say that I'm "pumping" the coin implies that I will dump the coin, when I'm really just interested in the Tezos technology, which is also present in Cardano.