This niche has always been popular that is was about time some projects were cooking behind the scenes. As we all know many projects don't have a purpose, and they start ICOs only to hastily raise a capital for something they have not idea for.
Others fields like online dating are also making their first steps into the blockchain terrain. But some of them fall short. Like I said, when we want to take something into Blockchain, we need to have purpose... a solution for a problem, so to speak.
Blockchain technology can harbor many fields. There are projects currently developed by Disney for their thematic parks, and NASA is using blockchain as well.
So, I think that with online dating - since it is a topic with a large audience - a project based on this field can have a good future.
Source: https://sites.google.com/view/dateme-online-dating/home then what happens with the existence of this tinder app if they use the blockchain, are there any significant differences and benefits that these users get?
if it doesn't bring any benefits at all, it's better not to force it to enter the blockhain domain because not all fields will be suitable for use with blockchain and crypto.