You just lost your bet.
CPU and RAM only. This option lets you increase or decrease the amount of CPU and RAM available to a Droplet.
Disk, CPU, and RAM. This option increases the amount of CPU and RAM available to a Droplet and permanently increases the size of a Droplet's disk.
But this will work too if your provider does not support automated droplet resize in both ways. But little different if we are talking about provider that allow you to increase only. You increase you VPS before validation and just after you need to destroy it and create new weaker one.
I would not risk my stake on 1 vCPU / 2 GB RAM.