Companies buy other companies to eliminate competition all the time, it's normal, fair and expected. It's also not the only reason to make such a purchase, remo

Companies buy other companies to eliminate competition all the time, it's normal, fair and expected. It's also not the only reason to make such a purchase, removing competition is just one variable out of many. I think the only time one can argue this shouldn't be allowed is for monopolies. Was Facebook considered a monopoly in the space where Instagram was competing in when it made the purchase?