It is a very confusing process with a lot of 'companies' who sell scouting services:
Airtime Scouting
Recruiting Boost
ATC Academy
AUSA
Aussie Basketball USA
ANZBS
BA Pathways
I've heard positive and negative comments about a number of these companies from players with personal experiences. Some are a lot more active on socials and actively 'sell' you to recruiters. And remember, some colleges pay these companies to refer athletes so that can influence where the company 'suggests' you sign and it may not necessarily be best fit.
I think speak to each, make judgement on fit and cost and make decision.
LC makes good point, self promotion through twitter, Instagram, YouTube with regular correspondence/posts to take some measure of ownership in it. I recently asked recruiter where they 'spotted' the athlete and they couldn't recall specifically except to say they saw footage and liked what they saw.
Tours are very expensive and some are run when colleges aren't able to attend to scout. Again - do your homework. Great experience for athlete to 'measure' capability
Also to LC point, go where you fit both athletically and financially. JUCO is a valid pathway.
From a international student perspective The NCAA eligibility Centre are very responsive to email to help navigate that space.