Salespeople are one of my least favorite types of people to talk to, right under bill collectors [0].
I'm also not a big fan of "free" services that require external (i.e. "out of my control") resources. I'm specifically looking for something that can be managed completely by myself with no assistance or resources needed by an third-party. Otherwise, there's always a chance that you'll change things. Then, I'll just be looking for alternatives.
Ironically, this is exactly why I'm looking for something now. I used Pingdom's "free plan" [1] as a simple up/down monitor but recently got an e-mail from them letting me know that, "We will no longer provide your existing free plan after January 28, 2016." [2]. Thus, here I am.
Of course, this is just me and my specific situation. I'm sure you've built a great product and it'll fill the needs of many customers.
[0]: At least you DO have pricing on your web site. I'll give you credit for that as a lot of companies don't. If I have to talk to someone on the phone just to get a price from you, though, I will never be your customer.
[2]: https://help.pingdom.com/hc/en-us/articles/206012222-Changes...