I don't understand why someone downvoted you. Giphy is used by many services and Facebook owning, having access to that data and the insights it could provide into the whole landscape would lead me to looking for another solution, although them purchasing it will give them all of the historical data they'd need to find new niches, successful and growing competitors or market segments that they can just copy into FB. The laws certainly haven't caught up with this new age of anti-competitiveness that's possible with how a single entity is tied into so many competing companies, and so just a big competitor buying up that resource certainly gives an arguably unfair competitive advantage.
Edit to add - TLDR: this essentially gives a backdoor to Facebook for usage at other companies who integrated the service.
