B2B contact is generally fine, unless you're going to be a stalker about it. Had one the other day who messaged me on linkedin with her pitch and included the standard 'If you have time and this is interesting feel free to reach out' I saw the e-mail pop up just as I was stepping away to have lunch, as it was the standard lunch time. Before I even got downstairs (work from home) my company's calling me out of the blue to tell me they have a call for me from this person. I declined the call, as we both agreed it was just business spam and after lunch responded and let them know we'd never be interested in their services. 'Feel free to get in touch if you're interested' and 'I'm going to track down your company's phone number and call you 30 seconds after I send this' just don't vibe for me.