Hi Ezra,
Yes, many people use dating apps to advertise their Instagram account. It is nothing new, and unless dating apps start cracking down on dating profiles like this, it doesn’t seem like this is something that will end any time soon.
Men do follow these women to their Instagram accounts, which only encourages them to keep advertising their Instagram accounts on dating apps.
You will find more dating profiles like this on dating apps that are more about casual dating. If you want to avoid dating profiles like these as much as possible, you are better off trying dating apps that are geared towards people seeking serious relationships such as Bumble or eHarmony.