Well, Likes can be given only to posts. But Likes can be associated with other data. eg.
- number of Likes on posts made by a member (eg. the /user page)
- number of Likes on posts in a topic
- number of Likes on the first post of a topic
I don’t know what would be best considered as topic Likes. For example, which is “better”
- a topic with 100 posts where every other post got 1 Like (50 total for the topic)
- a topic with 2 posts where the second post got 40 Likes
They could be further broken down by eg. individual members contributing to the total, date/time ranges.
But again, which is “better”
- a topic with a total of 50 Likes all by one or few members
- a short topic with a total of 40 Likes by 40 different members.
- a year old topic with 50 Likes
- a week old topic with 40 Likes