To expand on the above, look at the reaction to Mortal Kombat - the consumer response hasn't largely been "well, the DLC is worth it I guess, I'll go all in"; it's been "well, I'll just wait for the Komplete edition in about six months for about half the price."
This is happening more and more. The game market is saturated - indie titles are getting better (and cheaper), people have massive back catalogues of games (I think I have 100+ at last count) and people are just saying no to new games that represent a price risk.
What will happen eventually is that people will stop spending £50 on games full stop for a few reasons. First, they know they'll get it cheaper later (Evolve dropped in price by half inside three weeks, for example). Second, GOTY editions generally feature all the DLC, so even more of a saving. Third, game quality and innovation overall is, in my opinion, at an all time low, and new IPs struggle massively to make an impact unless they're very good (look at Watch_Dogs - a new IP, people bought into it, and got their fingers burnt. Look at Evolve, Titanfall, and so on - all AAA, all underwhelming).
When that happens, consumers don't buy at release, the companies profit margins slump, they haven't got the awareness to do anything but the status quo, and companies all over the place go quietly under.
