that / it

[unpakwon]

I'm confused about what the following in red means? And what do "that" and "it" in bold refer to?

So when you begin to engage with people you may want to fold into your life, seek out only as many as you have the bandwith to follow through with. Some people are capable only of one-night stands, which are great interactions during the first meeting followed up with... nothing. People don't commit to that when dating, and they don't like it much in the rest of their lives, either.

Thank you.

[J&K Tutoring]

The antecedent to both pronouns is great interactions.

[billmcd]

I'm confused about what the following in red means? And what do "that" and "it" in bold refer to?

So when you begin to engage with people you may want to fold into your life, seek out only as many as you have the bandwith to follow through with. Some people are capable only of one-night stands, which are great interactions during the first meeting followed up with... nothing. People don't commit to that when dating, and they don't like it much in the rest of their lives, either.

Thank you.

Great interactions of one-night stands.

[unpakwon]

Then the author used the singular pronouns for the plural noun "interactions".
It seems this kind of ungrammatical writing can be acceptable.

Anyway, thank you all.