Are there any restrictions in activating pro plan?

Yes, there are some restrictions. The Pro plan activation is tied to your license and can be limited by the number of allowed workstations, and prepaid cards are not supported for SaaS plans. You can see the relevant pricing and activation limits in Pricing and the workstation limit warning in Maximum number of workstations allowed by your license.

For Genymotion Desktop Pro, the pricing page says “Try Pro For Free” for 30 days, and the plan is offered as part of Desktop Pro with support included. The license warning also says you can use one device plus one spare, so activating on too many computers can block activation.