[tgsovlerkhgsel]

"Thank you for hacking our product" sounds perfectly appropriate to me; it clearly uses "hacking" in the positive sense.

[Delk]

It actually says "hacking on one of our programs", which makes it even more obvious that it's using the word closer to the positive traditional hacker culture sense.

I'm sure that still looks unprofessional to some people, just like any jargon that isn't corporatese does.

[carefree-bob]

I could have been giving this an uncharitable reading.