A major problem is to reach the right people within large organizations with such suggestions. Most such email requests go straight to the waste-basket since the gate-keeper doesn't understand and thinks it is spam.
I have found that engineers are often/usually quite helpful towards other engineers (and overly antagonistic towards any type of sales/management person). I've also found it quite easy to get the name and email (and often phone) of people within organizations that would be your users. The names/emails/phone are often listed in technical presentations, press releases, datasheets, app notes and such which can be found online. Contacting them directly and bypassing the gatekeepers should prove fruitful.
Some YouTube videos with how-to's on your products which are also posted on your website will also help... especially if it's "how to use the new XYZ from ITIC to <insert common use case here>".
Don't forget to ask for the sale - always. So if the person you reach isn't the one you need to be talking to, ask them for the name/email/phone of the right person... done in a friendly way, engineer-to-engineer, I've had pretty much a 100% success rate in doing this.
Like I said - engineers trust (and want to help) engineers. Just don't belie that it's a sales call