Given a travel related situation, and given a specific question about the situation, summarize the question into a title

Q: 5 months ago, I flew from Moscow to London with a connection in Amsterdam. My flight was late by nearly 3 hours and my connection was missed. I was put into a hotel overnight and flew the next day. At that time no compensation was offered from the airline. The journey was booked with lastminute.com It was with KLM and the delay was the airlines fault.

A few days ago I received a legitimately-looking email saying that passengers could be entitled to compensation. The email:


  From: "lastminute.com" 
  
  Hi [MY NAME],
  
  Get compensation for your flight delay!
  
  At lastminute.com, we want our customers to have the best travel experience possible, That's why we were sorry to see that your flight
  from Moscow to Amsterdam on 25 February, 2019 may have been delayed.
  
  Under EU Regulation (EC) No. 261/2004, introduced to protect European passengers against lengthy delays and other travel
  disruptions, you could be entitled to as much as €400 in compensation.
  
  You can either submit your claim directly to the airline, or get assistance from an external organization such as our partner AirHelp.
  AirHelp are the travel experts, making the process of gaining
  compensation for delayed, cancelled and overbooked flights simple and
  stress-free.
  
  AirHelp doesn't charge any service fees unless your claim is successful. Before using AirHelp's service, we advise that you check
  the company's terms, conditions and fees on their website
  www.airhelp.com.
  
  [LINK TO CLAIM]


Is it a bit suspicious I was contacthed 5 months after the flight and is there a point making a claim 5 months after the delay?


A: Email about missed connecting flight compensation 5 months after flight, is there a point?
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Q: I'm planning a business trip to Boston, Massachusetts, during which I'll have a day or two free to play railfan and tour its public transport system.

From my research at the MBTA website, it looks like there are two main ways to pay for transit rides there: either a contactless plastic card called CharlieCard or magnetic-strip paper tickets called CharlieTicket. Both operate on a stored-value principle, but the fares are lower with CharlieCard than with CharlieTicket.

Since I only have a few days, my instinct is that the paper CharlieTicket will be cheaper for me -- but on the other hand, during that time, I'm going to ride a lot more than the typical local, or even the typical tourist. So there's a possibility that the CharlieCard will break even for me.

However, I can't for the life of me find anywhere on the MBTA website where it says what the price of a CharlieCard is. Without knowing that in advance it is hard to figure out where the break-even point is.

Does anyone here happen to know?

(The card price may be disguised as a minimum non-refundable balance or something similar, like some other contractless transit payment card systems do, but I can't find anything about that either).



Bonus question: If I determine the card is advantageous for me, is there somewhere at Logan airport I can buy one at around 7pm on a Sunday? The MBTA's list of points-of-sale requires me to select a particular neighborhood of Boston from a textual list before it will show me anything, and I don't know which of them contains the airport.


A: What does a CharlieCard cost?
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Q: As an example I've recently been to Paris and the level of credit card adoption there is so high I didn't once need to take out cash. I likewise assume many of the locals avoid cash altogether and only pay by card. 

But what's the etiquette in places where tips are common, like bars and restaurants? Are you supposed to keep cash just for the tips? Or is it up to the waiter/barman to offer you a tip option on the card terminal? I've tried asking the wait staff if I can leave a tip by card but they either misunderstood me or their POS terminal didn't have such a feature. 


A:
Are cash tips still expected in cities where nearly everything is cashless?
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