Same reason Bitpay Wont = Core competencies. These companies are striving to become the best juggernaut Oligopoly companies that they can...trying to become the next Google/Apple/Microsofts of Bitcoin payment processing. They won't bother with "low hanging fruit" If anything...they would rather bootstrap a subsidiary startup altogether like Litepay or Litebase...I wish it weren't so...Just saying
This is a good amount of truth in this. After all, LTC is around 1/20 of the BTC cap. The shrewd business decision is to continue investing in your market share of the market with the larger cap and then acquiring the companies that address the markets with smaller caps. As a starting point, since there were already so many compliance and legal issues the first time around with BTC, why would they want to jump into that foray again with other alt-currencies?