Sorry this gets me upset. What a load of bull*#& about .edu links. The only thing that's resulted from this myth is increased rate of spam on educational institutions around the world. I wish people would stop doing this.
Yes .edu domains tend to have good trust from search engines, but that doesn't mean that if you create an empty profile and whack in your link Google will factor this into their link graph, especially if you use duplicate or no content at all. Same goes for forum/comment spam.
To get great value from .edu domains (like with anything else) you would have to have a nice editorial link connected to another page or home page, pagerank and not 1000 outgoing links to viagra and payday loans. To get these types of links you would need to earn them through contribution, engagement or become some type of sponsor. Either way it isn't simple, quick or cheap.
If you base your link building on tactics like the one you describe above you're giving Google search quality team something to penalise you for if they get to review your website at some point in the future.