> Why are they paying taxes

"Paying our taxes" in this kind of context is nearly always shorthand for "filling out our tax returns". That part usually takes a substantial hunk of time. The actual payment process is typically writing a check or entering credit card info, which just takes a few seconds.

Well, in this case it was actually literally paying our taxes. (In the photo, Steve is about to initiate a wire to the IRS.) At our size, it's not a check -- and certainly not a credit card.

As to why we're paying taxes: while tax minimization is certainly a thing (and we have taken advantage of things like R&D tax credits), we're paying taxes because we're profitable.