Shipping Pig: A Time-Killing Game?

I felt that the app 'Shipping Pig,' which can also be used for point-gathering activities, was quite slow to accumulate points. You might think, 'Oh, it's exchangeable from 50 yen, so it's fast, right?' Well, most point-gathering apps I use require 300 yen for exchange, and compared to those, I found it slow. While point-gathering apps like 'Town Wi-Fi' accumulate points relatively smoothly, 'Shipping Pig' is slow because you need to invite friends, etc. (though inviting friends does give you a lot of points). As for the gameplay, the in-game currency (not the actual money for point-gathering) accumulates quickly, so there are times when it's a bit fun to see numbers rise in a way you wouldn't normally see. But if you ask, 'What about beyond that?' I'd have to say, 'Hmm...' I thought it could be used as a way to kill time. There are virtually no forced ads, but the 'Silver Pig' and 'Gold Pig' features do have forced ads, likely because they affect point accumulation. Since 'Shipping Pig' is handled as an offer by apps like 'Town Wi-Fi,' I thought it's best to do it through those offers. Honestly, I'm only doing it because it's an offer; otherwise, as a time-killing game, I would uninstall it immediately. I really think it's better to do it through offers on apps like 'Town Wi-Fi'.