MARKETWATCH - Mar 20 - The complicated relationship between Tinder and Bumble has exploded into a very public spat. Tinder-parent Match Group filed a lawsuit against Bumble, alleging patent infringement and theft of trade secrets. Bumble responded with a full-page ad in the New York Times. Sam P. Israel, a New York-based intellectual property lawyer, said that Bumble's blog-post response to the lawsuit was striking in that it barely mentioned the legal issues. "Instead it's saying that we won't be bullied by you and we don't want to have the same sort of thing going on on our site," Israel said. Match Group CEO Mandy Ginsberg told staffers in an internal memo that the Bumble lawsuit was "about protecting the integrity of your work" and "not about singling out any individual company." From an investment standpoint, Jefferies analyst Brent Thill thinks that Match Group investors should breathe a sigh of relief after hearing that Bumble isn't interested in being acquired by Match. "While acquisitions could provide another growth asset to Match's portfolio, the deal would have been costly and potentially dilutive to current shareholders," he wrote.