Bitcoin being established and loved already by the community is prolly one reason why they're stopping. Or, they have probably made already a few but then it doesn't make sense to compete against the one that has started it all.

They just can't go with the people when everyone has already made their choice by investing in Bitcoin. And in fact, if you go around with the market and see the various altcoins there.

Who knows if one or two or several of them are like watch dogs and backed by government but even so, none of them can stop and compete against BTC.