LinkedIn requests for product role reference

Is it just me or have the requests for product roles (PM, UI/Ux desiner etc) referrals increased a lot on LinkedIn recently. I have received almost 25 such request in the last 2 momths. Wanted to know is it because:

1. People more interested in these roles
2. Layoffs because of which people are switching
3. Lack of such roles in industry or
4. Ppl looking out for salary hikes

Want to know the market trend.