It’s actually a well researched business case study and in the case of Tinder carried out perfectly. It’s too hard for existing company to disrupt itself because it takes too long for the new venture to make a significant difference to the bottom line, the value chain and company structure is too entrenched, the standard for excellence is too high for a nascent product or service. In business literature to avoid getting disrupted you’re supposed to set up a independent office far away and incentivize the “founding” team with upside and full autonomy and credit for success.