Twitter is, more than anything, a media company. It's a bit unfair they're compared to tech companies in terms of performance.
Twitter is a cultural phenomenon more than a product. That's why I'm always skeptical of people questioning its long term success. Unless another platform emerges to replace it, its cultural momentum should be enough to sustain its presence, even without profitability.
Maybe Twitter will never be individually profitable, but it has enough cultural power for a large media company to justify subsidizing its costs with profits from the overall income of a media empire.
As such, Twitter seems better off as a unit of a large media company like Disney rather than a calculated profit center like Google or Facebook. Its synergy with other products can make it a sustainable investment for a media company.
Disney was one of the first companies to popularize Twitter, as ESPN and ABC contributed to its early growth by bringing athlete and celebrity tweets into the mainstream. The Disney media empire benefits from this synergy with Twitter. It therefore makes sense for Disney to roll Twitter into its media portfolio.