What would be fairest is to let a competing startup have their launch thread without trying to interfere with it. Each startup deserves its own day in the sun.

If you're going to post, you certainly shouldn't do it more than once.

Replying in multiple places to change the subject to your own promotion is in bad taste, and orchestrating exchanges with seemingly-unrelated other users is an outright abuse and the sort of thing we ban accounts for if they do it repeatedly.